Solve the system of equations.
2x + 7y = 3
x= -4y

Answer:

Step-by-step explanation:

      let x=0.4666...

        10x=4.666...

      100x=46.6666...

100x-10x=46.6666... - 4.6666...

       90x= 42

            x=42/90

So 0.4666... is equal to 42/90

Answer:

Willa can type 60 words per minute

Step-by-step explanation:

60 minutes = 1 hour

1/4 hour = 1/4 × 60 minutes

= 60/4 minutes

= 15 minutes

Quarter of an hour= 15 minutes

Willa can type 900 words in 15 minutes

how many words per minute can willa type?

Words per minute= Total words in 15 minutes / 15 minutes

= 900 / 15

= 60 words per minute

Willa can type 60 words per minute

Answer:

18 pieces

Step-by-step explanation:

This is a division problem.

1 m = 100 cm

To convert from cm to m we divide the length in cm by 100.

40 m + 50 cm = 40 m + 50/100 m = 40.5 m

The rope is 40.5 m long.

9/4 m = 2.25 m

Each piece is 2.25 m long.

[tex] \dfrac{40.5~m}{2.25~m} = 18 [/tex]

Answer: 18 pieces

Answer:

  exponent: 3; base: 4

Step-by-step explanation:

An exponent is used to signify repeated multiplication. In a typeset expression is has a superscript format. The base is the value being repeatedly multiplied.

  [tex]4^3=4\cdot4\cdot4[/tex]

The exponent is 3.

The base is 4.

_____

In plain text, an exponent is preceded by a caret (^). If the exponent consists of more than a single constant or variable, it must be enclosed in parentheses. The above expression would be written as 4^3.

Answer:

z = 32

Step-by-step explanation:

Add 3 to both sides.

5 + 3 = z/4 -3 + 3

8 = z/4

Multiply 4 on both sides. 8 times 4 is 32.

32 = z

Answer:

[tex]8\frac{37}{56}[/tex]

Step-by-step explanation:

[tex]12\frac{2}{7} + 3\frac{5}{8} = \frac{86}{7} + \frac{29}{8} = \frac{688 - 203}{56} = \frac{485}{56} = 8\frac{37}{56}[/tex]

Answer:

C is the answer!!

Step-by-step explanation:

Answer:

m ∠ M L N = 120

m < QLP =50

Step-by-step explanation:

Ray lq at 0 or 180,

ray lp at 50 or 130,

ray ol at 90,

ray ln at 60 or 120

and ray lm at 0 or 180

Lets substitute the values of the angles to check the given options

1) ∠ Q L P + m ∠ P L O =m< MLN+m< NLO m

50 +40= 120+30

90 is not equal to 150

2) m < QLO- m < QLP =m < MLO-m< MLN m

90-50 = 90-120

40 is not equal to 30

3) m< MLN\:=\:120  From the figure based on observation this is correct.

4) m < QLP =50   From the figure based on observation this is also correct.

Answer:

Given: Angle L N O ≅ Angle L N M

           Angle O L N ≅ Angle M L N

Prove: Angle L N O ≅ Angle L N M

Triangles L O N and L M N share common side L N. Angles O L N and N L M are congruent. Angles O N L and L N M are congruent.

It is given that angle LNO is congruent to angle

✔ LNM

and angle OLN is congruent to angle

✔ MLN

. We know that side LN is congruent to side LN because of the

✔ reflexive property

. Therefore, because of

✔ ASA

, we can state that triangle LNO is congruent to triangle LNM.

Step-by-step explanation:

Answer:

Mae used 1/4 of the whole bag on Wednesday.

Step-by-step explanation:

From the question, we understand that the fraction of the whole bag that Mae used on Monday is 3/4.

On Wednesday, we are then told that Mae uses 1/3 as much fruit as on Monday.  

This means that Mae uses 1/3 of the fruits she used on Monday. The fruits she used on Monday was actually 3/4 of the whole.

This means that on Wednesday, Mae used 1/3 of 3/4 fruits.

In Mathematics, the word "of" there stands for multiplication. Hence, Mae used 1/3 X 3/4 = 1/4 of the whole bag

Mae used 1/4 of the whole bag

Answer: r = 1 10/11

Step-by-step explanation: The quantities x and y are proportional.

The direct variation between {x] and {y} is discussed below.

Direct variation of a quantity {y} with respect quantity {x} means that the value of {y} increases as the the value of {x} increases. Mathematically -

y = Kx

K = y/x

where -

{K} is scale factor.

Given is that the quantities {x} and {y} are proportional.

The general equation of a straight line is -

y = mx + c

{m} - slope

{c} - intercept along the y - axis

The straight line graph also represents a direct variation between {x} and {y}. We can write -

m = (y - c)/x

Here the ratio of (y - c)/x is always constant.

So, we can write -

(y₁ - c)/x₁ = (y₂ - c)/x₂ = m = k

for c = 0, we can write -

y₁/x₁ = y₂/x₂ = m = k {constant}

Therefore, the direct variation between {x] and {y} is discussed above.

To solve more questions on direct variation, visit the link below -

brainly.com/question/14254277

#SPJ3

Answer:

16.35Rs would be paid by everyone.

Step-by-step explanation:

98.10/6

=16.35Rs would be paid by everyone.

Hope it will help you :)

Answer:

10

Step-by-step explanation:

The absolute value always returns a positive value, thus

| a | = | - a | = a

Given

| 5 - 15 | = | - 10 | = 10

Answers:

a = 3

x intercept = -2

===========================================================

Explanation:

f(x) is the original function given. Let g(x) be the inverse of f(x).

To find the inverse, we first replace f(x) with y to get

y = (1/3)x-2

Afterward, we swap x and y to get

x = (1/3)y-2

From here, we must isolate or solve for y. To do so, add 2 to both sides and then multiply both sides by 3

x = (1/3)y-2

x+2 = (1/3)y

3(x+2) = y

y = 3(x+2)

g(x) = 3(x+2)

This explains where the x+2 comes from in the a(x+2) expression

The value of 'a' is therefore a = 3

------------

To find the x intercept of the inverse, we replace g(x) with 0 and solve for x

g(x) = 3(x+2)

0 = 3(x+2)

0/3 = x+2

0 = x+2

x+2 = 0

x = 0-2

x = -2

The x intercept is x = -2. Plugging this x value into g(x) leads to g(x) = 0.

The g(x) graph crosses the x axis at x = -2.

Answer:

the first picture would be concave and the second one would be convex

Step-by-step explanation:

Well concave means to go inwards and convex means to go outwards.

Answer:

d=4√2

Step-by-step explanation:

distance formula = √(x2-x1)²+(y2-y1)²

d=√(4-8)²+(-7-(-3))²

d=√4²+(-4)²

d=√16+16 = √32=√2²*2²*2

d=4√2

Answer:

Step-by-step explanation:

[tex]m\angle BHD=180^o-x^o[/tex]

[tex]m\angle DBH+m\angle BHD+m\angle HDB=180^o\\\\47^o+180^o-x^o+31^o=180^o\\\\78^o-x^o=0\\\\x^o=78^o[/tex]

Answer:

The mean will be (significantly) less.

Depending on the other items, the median is either affected only slightly or not at all.

Of all the answer choices, B is the correct one.

Step-by-step explanation:

So, we know that initially, Chucky had a total of 12 items. Each of the items has a different price, but the average cost of them is $7.41.

One item of the twelve was a wheel of cheese that costs $39.99.

And we want to know how the average cost and median cost will be affected if we remove this wheel of cheese.

The important thing to note here is that the average cost is $7.41. The wheel of cheese, however, costs $39.99. Thus, it is an outlier. It is significantly more expensive than the other items.

Initially, to find the mean, we had to add the 12 items together and then divide by 12. However, now that we removed the expensive outlier, the average cost will now be less.

Algebraically, we can see this. Let t be the total cost of the items excluding the cheese. Thus, the mean initially is:

[tex]7.41=\frac{t+39.99}{12}[/tex]

Find t. Multiply both sides by 12:

[tex]88.92=t+39.99\\t=48.93[/tex]

Therefore, all the other items excluding the cheese totals $48.93.

If we remove the cheese, the total is now $48.93 and with only 11 items. Thus, the mean is now:

[tex]48.93/11\approx\$4.45[/tex]

This is almost $3 less than the original mean. Thus, the mean has decreased significantly.

For the median, we really don't know. Recall that the median is simply the "middle" quantity. Assuming all the other products are similarly priced, the median may only change slightly or it may not at all. However, we can only guess for the median as it will depend on the prices of the other products. Nevertheless, it mostly likely decrease.

Edit: Added Letter Answer

Answer:

B

Step-by-step explanation:

Create a function to help determine his total cost.

12 x $7.41 = $88.92

After putting the cheese back he has 11 items and his total cost went down.

$88.92-$39.99 = $48.93

To find the average cost per item divide by 11.

$48.93/11 = $4.45 per item

The mean (average) has gone down.

The median would be the middle number, so you would need to line the cost of the items up from least to greatest. If you have an even number of items, you take the mean of the middle 2 numbers. The block of cheese would have have given Chucky 12 items so the 2 middle numbers would have been averaged.

A hypothetical 12 and 11 items:

$1  $2  $2  $3  $4  $4  $5  $6  $7  $7  $8  $39.99

Mean $7.42  Median $4.5

$1  $2  $2  $3  $4  $4  $5  $6  $7  $7  $8

Mean $4.45     Median $4

Taking the cheese away would move the middle down 1 number so it would also go down, but not as much as the mean of cost per item.

B. Both the mean and median will decrease, but the mean will decrease by more than the median.

Step-by-step explanation:

x is 10

FO is x+10

OG is 10+10

FG is x+3x

Answer:

Step-by-step explanation:

1/2a+20=50

1/2a=30

a=10

Answer:

a= 60

Step-by-step explanation:

1/2a+2/3b=50, when b=30

Let's first subsitute 30 into b:

1/2a+2/3(30)=50

According to the order of operations, we must multiply 2/3 and 30 first.  So:

2/3 times 30 equals 20.

2/3 times 30/1.  3 goes into 30 ten times, so 2 times 10= 20.

Now we got:

1/2a+20=50

Since 20 and 50 are like terms, you want to geth those two together.  So, move the positive 20 to the other side where 50 is.  Since 20 got moved to the opposite side, it changes signs and becomes negative.

So:

1/2a=50-20        

50-20= 30

1/2a=30

Multiply each side by 2 because 2 is the only number that'll make the variable a just 1a.

1/2a times 2= 1a

30 times 2= 60, so:

1a= 60, which is also a= 60.

So a= 60.

Answer:

Step-by-step explanation:

12x + 2y = 26x - 70

2y = 14x - 70

y = 7x - 35

the answer is A

Answer:

a

Step-by-step explanation:

Given

12x + 2y = 26x - 70 ( subtract 12x from both sides )

2y = 14x - 70 ( divide all terms on both sides by 2 )

y = 7x - 35 → a

Answer:

(a)

[tex]4.5y \geqslant 9[/tex]

(b) 3, 4, 5

Step-by-step explanation:

(a) 4.5 × y = 9 and above

[tex]4.5y \geqslant 9[/tex]

(b)

[tex]4.5y \geqslant 9 \\ y \geqslant \frac{9}{4.5} \\ y \geqslant 2[/tex]

Possible y values = 2 and over

eg. 3, 4, 5

hope this helps :))

Answer:

See below.

Step-by-step explanation:

In multiplication and division of two numbers:

equal signs equal positive

different signs equal negative

Now you can answer every question.

1. What is a negative times a positive different signs negative

2. A Positive times positive equal signs positive

3. A negative times a negative equal signs positive

4. What is a negative divided by a positive different signs negative

5. A Positive divided by positive equal signs positive

6. A negative divided by a negative equal signs positive

Answer:

1: - x + = -

2: + x + = +

3: - x - = +

4: - divided by a + is -

5: + divided by a + is +

6: - divided by a - is +

Answer:

3x + 6

Step-by-step explanation:

It's A because x + x + x = 3x and 2+2+2 = 6

Answer:

$19,000 loss

Step-by-step explanation: Cost of the car: $29,000

                                              Cost of the car he sold for: $10,000

                                              Total lost occurred: $29,000 - $10,000 = $19000

                                              Therefore, the lost occurred was $19,000

Answer:

2x^2 - 7  

we can plug any values of x into this The domain is All Real x.

The graph will be a parabola opening upwards with a minimum value  when x = 0  and  f(x) will be = -7

so the range is  f(x) <= -7    or  (-∞, -7]

Answer:

the answer is the second option

Step-by-step explanation:

Range is all the y values

Answer:

[tex]y=-11[/tex]

Step-by-step explanation:

So we have the equation:

[tex]y=-2x+1[/tex]

To find y when x is 6, substitute x for 6. Thus:

[tex]y=-2(6)+1[/tex]

Multiply:

[tex]y=-12+1[/tex]

Add:

[tex]y=-11[/tex]

So our answer is -11 :)

Answer:

The answer is -11 which means y = -11.