Mathematics High School

solve: x+y=3 2x+3y=7


I need this answer fast
​

Answers

Answer 1
2x➕2y=6
2x➕2y ➖（2x➕3y）=6➖7
-y=-1
y=1
x=3➖1=2
Answer 2

Answer:

If you were to make these two equations in slope intercept form, here's what it would be like;

First the formula for slope intercept form is, y = mx + b

where m represents the slope and b is the y intercept(where the line meets the y axis)

First equation;

x + y = 3

we need to isolate y so we subtract x from both sides

-x       -x

y = -x + 3 (we put the -x before the 3 because that's how the formula is formatted)

Second equation;

2x + 3y = 7

Isolate y by subtracting 2x away from both sides

-2x       -2x

3y = -2x + 7, y is not fully isolated because it has a coefficient and it's supposed to be just y, so we divide both sides by 3:

/3       /3

y = -2/3x + 2 1/3

Related Questions

Express (x+3)^2 as a trinomial in standard form.

Answers

Answer:

x^2+6x+9

Step-by-step explanation:

(x+3)^2

(x+3)(x+3)

x^2+3x+3x+9

x^2+6x+9

What is the area of this figure?

Answers

You can fine the area of the figure by width times height


I need help finding surface area

Answers

Your answer would be 64 ft
4x4x4

7) A classroom had 63 glue sticks. If the ratio of glue sticks to glue bottles was 9 : 1, how man
glue bottles did the classroom have?

Answers

Answer:

7 bottles of glue

Step-by-step explanation:

63/9= 7

every time there are 9 sticks, there is one bottle.

Answer:

7 glue bottles

Step-by-step explanation:

Ratio of glue sticks to glue bottles = 9 : 1

Therefore, 9x : 1x

If there are 63 glue sticks in total:

⇒ 9x = 63

⇒ x = 7

Therefore, glue bottles = 1x = 1 × 7 = 7

A bicycle store cost 4500$ per month to operate. The store pays an average of 35$ per bike. The average selling price of each bike is 125$.How many bicycles must the store sell each month to break even

Answers

Answer:

50

Step-by-step explanation:

let x be the no of bicycles to be sold

125x = 4500 + 35x

125x-35x = 4500

90x = 4500

x = 50

to exactly match the expenditure, atleast 50 bikes have to be sold

A wire is in the shape of a rectangle of length 14cm. Find its breadth if the same wire is re- bent into a square of side 13cm. Also find out their areas and write which one encloses more area, the rectangle or square.

Answers

Length= 40cm

Breadth= 22cm

Perimeter of the rectangle= Length of the wire

=2(l+b)= 2(40cm + 22cm)

=2\times62cm = 124cm

Now, the wire is rebent into a square.

Perimeter= 124cm

4\times side=124

Therefore side= \frac{124}{4}cm= 31cm

So, the measure of each side= 31cm

Area of rectangular shape= l\times b

=40cm\times22cm

=880cm^2

Area of a square shape= \left(Side\right)^2

=\left(31\right)^2=961cm^2

Since 961cm^2\ >\ 880cm^2

Hence, the square encloses more area.

Answer:

See below.

Step-by-step explanation:

Area by square = 169

Area by rectangle = 14 x 12 = 168

So more for square hope it helps Alphonsa

i need help finding the answers on this question there is more than one

Answers

Answer:

number 1,2 and 3

hope it will help you.

if it is wrong then sorry

Answer:

Here's the correct answers for your queries.

But the last option is not correct because z° and y° do not collectively form 90° which is the complementary angle. And the values are also provided.

Therefore,

The Correct Answers Are:

√A

√B

√C

But not D.

f(x)=-x^2+6 f(x)=−x 2 +6 \text{Find }f(-1) Find f(−1)

Answers

Answer:

7

Step-by-step explanation:

[tex]f(x) = x^{2} + 6[/tex]

[tex]f(-1) = (-1)^{2} + 6\\f(-1) = 1 + 6\\f(-1) = 7[/tex]

Fifteen less than the product of three and a number is thirty-six.
what is this in an equation?

Answers

Answer:

Let the unknown number be x,

equation would be :- 3x - 15 = 36

The dot plots show the number of points that Sophia and Valerie each scored in the first 10 basketball games. The mean for Sophia's Basketball is 8. 5 points and the mean for Valerie's Basketball games is 15. 5 points. The mean absolute deviation of both distributions is 2 points

Part A: The mean number of points scored by Valerie is 2 or 7 or 8. 5 or 15. 5 greater than the mean numbers of points scored by Sophia.

Part B: What multiple of the mean absolute deviation represents the difference in the mean number of points scored by Sophia and Valerie in the first 10 basketball games?

2. 5

3. 0

3. 5

4. 0

Answers

The mean number of points scored is the average of points scored

The mean number of points scored by Valerie is 7 greater than the mean numbers of points scored by Sophia.

How to interpret the mean?

The given parameters are:

Mean for Sophia's = 8.5 pointsMean for Valerie's = 15.5 points. Mean absolute deviation of both = 2 points

Calculate the difference (d) between the mean values

d = 15.5 - 8.5

Evaluate the difference

d = 7

Hence, the mean number of points scored by Valerie is 7 greater than the mean numbers of points scored by Sophia.

The multiple of the mean absolute deviation?

In (a), we have:

Mean absolute deviation of both = 2 points

Difference  = 7

Express as products

Difference = 2 * 3.5

Hence, 3.5 is a factor of the difference between the mean

Read more about mean absolute deviation at:

https://brainly.com/question/447169

8.
Which fraction would make this equation true? 5 x ?/? = 6 1/4
3/4
4/4
5/4

Answers

It’s 5/4 I multiplyed it it is really eseay

x + y = 95. and y is 2/3 of x. find x and y.​

Answers

Answer:

{x,y}={60,35}

Step-by-step explanation:

// Solve equation [2] for the variable  x

 [2]    x = y + 25

// Plug this in for variable  x  in equation [1]

  [1]    (y +25) + y = 95

  [1]    2y = 70

// Solve equation [1] for the variable  y

  [1]    2y = 70

  [1]    y = 35

// By now we know this much :

   x = y+25

   y = 35

// Use the  y  value to solve for  x

   x = (35)+25 = 60

Answer:

x=57

y=38

Step-by-step explanation:

(1): x+y=95

(2): y=2/3x

substitute y=(2/3)x in equation (1):

x+(2/3)x=95

Multiply both sides by 3

3x+2x=285

5x=285

Divide both sides by 5

x=285/5

x=57

substitute x=57 in equation (2):

y=2/3×57=38

hence: x=57 , y=38

which answers are which?

Answers

Answer:

Triangle A and B= Acute, Triangle C= Right, and Triangle D= Obtuse

Step-by-step explanation:

Acute= Less than 90 degrees

Right= 90 degrees exactly

Obtuse= More than 90 degrees

You look at the measurements provided and determine your answer.

Why do teachers use a percent when grading school work?

Answers

Answer:

easier to grade and to calculate average

Step-by-step explanation:

Liquid A has a density of 1.42 g/cm³
7 cm³ of liquid A is mixed with 125 cm of liquid B to make liquid C.
Liquid C has a density of 1.05 g/cm³.
Find the density of liquid B.
Give your answer correct to 2 decimal places.​

Answers

Step-by-step explanation:

if I understand correctly, then we are mixing 7 cm³ of liquid A with 125 cm³ of liquid B to a liquid C.

A has a density of 1.42 g/cm³.

B has a density of x g/cm³.

the resulting C has a density of 1.05 g/cm³.

the first thing we see is the quantity of C :

C = A + B = 7 + 125 = 132 cm³

what "comes in" must also "come out" again.

there is no mentioning of a chemical reaction, that might cause a change of volume or mass of the mixture.

so, the whole is exactly the sum of its ingredients.

now about mass and density :

as also the mass (g) of the resulting C must be the same as the sum of the masses of A and B, we multiply the density by the quantity of every liquid to get the mass (g). and that is how we get then the missing density of B :

7×1.42 + 125x = 1.05×(7+125)

9.94 + 125x = 1.05×132 = 138.6

125x = 128.66

x = 1.02928 ≈ 1.03 g/cm³

Pleaeeeeee helppp!!!

Answers

Easy is 12 you must to multiply 60x10 divide by 10

Answer:

$22 I think?

Step-by-step explanation:

I believe you take $50 and add 10% sales tax to it and your total will be $55 and then subtract 60% from that to get the final price of $22.

if 7 is mean of 10,3,4,a,6,9,10. Find the value of a​

Answers

Answer:

Step-by-step explanation:

Mean=((4+10+3+6+9+10+a)/7)=7

=>42+a=49

=>a=7Mean=((4+10+3+6+9+10+a)/7)=7

=>42+a=49

=>a=7

Answer:

a = 7

Step-by-step explanation:

Given:

7 is mean of 10,3,4,a,6,9,10

To Find:

Value of a

Solve:

Mean → [tex]\frac{(4+10+3+6+9+10+a)}{7}=7[/tex]

⇒ 42+a=49

Subtract 42 from both sides

x + 42 - 42 = 49 - 42

Simplify

⇒ a=7  

~Learn with Lenvy~

What is the solution to (x-12)^2-48=0 ?

Answers

Add
48
48
to both sides of the equation.
(
x
−
12
)
2
=
48
(
x
-
12
)
2
=
48
Take the square root of both sides of the equation to eliminate the exponent on the left side.
x
−
12
=
±
√
48
x
-
12
=
±
48
Simplify
±
√
48
±
48
.
Tap for more steps...
x
−
12
=
±
4
√
3
x
-
12
=
±
4
3
The complete solution is the result of both the positive and negative portions of the solution.
Tap for more steps...
x
=
4
√
3
+
12
,
−
4
√
3
+
12
x
=
4
3
+
12
,
-
4
3
+
12
The result can be shown in multiple forms.
Exact Form:
x
=
4
√
3
+
12
,
−
4
√
3
+
12
x
=
4
3
+
12
,
-
4
3
+
12
Decimal Form:
x
=
18.92820323
…
,
5.07179676
…

Answer:

x = 18.928, 5.0718

Explanation:

x = 4√3 + 12, - 4√3 +12

decimal form:

x = 18.928, 5.0718

HELLPPP PLEASSEE!!!


The spinner has 3 equal sections for each color: green, purple, and orange.


What is the probability of landing on a color other than green?


Enter your answer as a fraction, like this: 42/53

Answers

Answer:

2/3

Step-by-step explanation:

so, you have a circle and if you divide it into 3 equal sections each of those sections take only 1/3 of the circle.

1/3 + 1/3 + 1/3 = 1

if one of the thirds is green then the probability of it landing on another color would be 2/3 being the other two colors.

Please help + show work ​

Answers

Answer:

8.4

Step-by-step explanation:

42/5 = 8.4

Each value is multiplied by 8.4.

Have an amazing day!

PLEASE RATE!

One number is 3 less than 4 times a second number. The difference of the first number and twice the second number is 7. What are the two numbers?

Answers

Answer:

x = -11, y = -2

Step-by-step explanation:

There's two equations. Let's say the first number is x, and the second number is y. Then, there is 4y-3 = x, and 2y-x = 7. We plug in 4y-3 for x into the second equation, and we get 2y - (4y-3) = 7. Solving more gets us -2y + 3 = 7. thus, -2y = 4, meaning y = -2. We plug back into the second equation, getting -4 - x = 7. This 11 = -x, or x = -11.

If you're solving a quadratic equation by factoring
what would the factorization of f(x)=2x^2+15x+7

Answers

Answer:

(2x+1)(x+7)

Step-by-step explanation:

Which of these numbers is not equivalent to the other three? Need answers ASAP

A. 44/8
B. 5 1/2
C. 5 1/5
D. 5.500

Answers

Answer:

C. 5 1/5

Step-by-step explanation:

A, B, and D are all 5.5 and C alone is 5.2

Answer:

C is the odd one.

Step-by-step explanation:

Let's verify each option.

Option A

44/8 = 40/8 + 4/8 = 5 1/2 = 5 + 0.5 = 5.5

Option B

5 1/2 = 5 + 0.5 = 5.5

Option C

5 1/5 = 5 + 0.2 = 5.2

Option D

5.500 = 5.5

Looking at the options, we can see that the result of Option A, B, and D are same.

This means that the odd one is Option C.

- 4x^2 - 7= -11
lesser x =
greater x =
Show Calculator

Answers

Answer:

less x is 1 greater x is 1

Step-by-step explanation:

I am the calculator

Select the correct answer from each drop-down menu.
A mother tracks the duration of her baby's two daily naps for a few weeks. The mean time and variance, in minutes, for each nap are recorded in
the table. On average the baby takes a longer nap for the (second nap/first nap) the length of the baby’s nap varies more in the (second nap/first nap)

Answers

Answer:

second nap,second nap

Step-by-step explanation:

just took it on plato and got 100%

14+5x= 3(-x+3)-11
Find x

Answers

Answer:

x=-2

Step-by-step explanation:

[tex]14+5x=3\left(-x+3\right)-11[/tex]

[tex]3\left(-x+3\right)-11[/tex]  ← ( Expand)

[tex]14+5x=-3x-2[/tex]

[tex]14+5x-14=-3x-2-14[/tex] ← ( Subtract 14 from both sides)

[tex]5x=-3x-16[/tex]

[tex]5x+3x=-3x-16+3x[/tex]

[tex]8x=-16[/tex]

[tex]\cfrac{8x}{8}=\cfrac{-16}{8}[/tex]  ← ( Divide both sides by 8)

[tex]x=-2[/tex]

~

Answer:

-2

Step-by-step explanation:

In the question we have given with an equation that is 14 + 5x = 3 ( -x + 3 ) - 11 .

And we are asked to find the value of x.

Solution : -

[tex] \longmapsto \: 14 + 5x = 3( - x + 3) - 11[/tex]

Step 1 : Solving parenthesis on right side :

[tex] \longmapsto \: 14 + 5x = - 3x + 9 - 11[/tex]

On further calculations we get :

[tex] \longmapsto \: 14 + 5x = - 3x - 2[/tex]

Step 2 :

Subtracting 14 from both sides :

[tex] \longmapsto \: \cancel{14} - \cancel{14 }+ 5x = -3x -2 - 14[/tex]

On further calculations we get :

[tex] \longmapsto \: 5x = - 3x - 16[/tex]

Step 3 : Adding 3x on both sides :

[tex] \longmapsto \: 5x + 3x = - \cancel{ 3x} + \cancel{3x} - 16[/tex]

On further calculations we get :

[tex] \longmapsto \: 8x = - 16[/tex]

Step 4 : Dividing by 8 on both sides :

[tex] \longmapsto \: \frac{ \cancel{8}x}{ \cancel{8}} = \cancel {\frac{ - 16}{8} }[/tex]

We get :

[tex] \longmapsto \: \red{\boxed{ \mathfrak{x = - 2}}}[/tex]

Therefore , value of x is -2 .

Verifying :

We're verifying our answer by substituting value of x in given equation . So ,

14 + 5x = 3 ( -x + 3 ) - 11

14 + 5 ( - 2 ) = 3 { -( -2 ) + 3 ) - 11

14 - 10 = 3 ( 2 + 3 ) - 11

4 = 3 ( 5 ) - 11

4 = 15 - 11

4 = 4

L.H.S = R.H.S

Hence , Verified .

Therefore , our value for x is valid .

#Keep Learning

Using a p-value of .05 means that there is a 95% chance that the results of a study are truly statistically significant. This means that there is still a 5% chance those results are due to chance. This, combined with ________, are two main contributing factors to the reproducibility crisis.

Answers

Step-by-step explanation:

”. What this means is that there is less than a 5% probability that the results happened just by random chance, and therefore a 95% probability that a results reflects a meaningful pattern in human psychology. We call this statistical significance, and, statistically speaking, this is a pretty high standard

If this means that there is still a 5% chance those results are due to chance. This, combined with publication bias , are two main contributing factors to the reproducibility crisis.

What is publication bias?

When the results of research investigations affect whether or not they are published, it is known as publication bias.

It alludes to the propensity of academics, journals and other interested parties to publish studies with statistically significant or favourable outcomes while omitting or underreporting those with non-significant or unfavourable outcomes.distorted and incomplete.

Learn more about publication bias here:https://brainly.com/question/25877200

#SPJ3

HELP!!! MATH!!! Plessssssss!!!​

Answers

Answer:

the answer would be b

Step-by-step explanation:

the other 2 have negatives and the 3rd option is whole so b

PLEASE HELP!!

The table below shows how much money you have in savings each week. Answer the questions below

Answers

B: $50
C : Y=25x+50
D: Y = 25(20) + 50
500 + 50
550

What is cos 16 degrees

Answers

Answer:

-0.96126 but this isn't rounded so you will need to round yourself

Answer:

The answer is

Step-by-step explanation:

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