Answer: x= 2, y= -1/2
Step-by-step explanation:
The value of x is 2 and y is -1/2
equations are 3x-2y=7 --1
7x+2y=13 --2
lets consider 3x-2y=7 as equation 1,
consider 7x+2y=13 as equation 2
by putting both the equations :-
3x-2y=7
7x+2y=13
we get 10x=20
x=20/10
x=2
Now by putting the value of x in equation 1;
3(2)-2y=7
6-2y=7
-2y=1
y=-1/2
What is a simultaneous equation?Simultaneous equations are two or more algebraic equations that share variables e.g. x and y. They are called simultaneous equations because the equations are solved at the same time. Each of these equations on its own could have infinite possible solutions.
What is meant by algebraic equation?algebraic equation, a statement of the equality of two expressions formulated by applying to a set of variables the algebraic operations, namely, addition, subtraction, multiplication, division, raising to a power, and extraction of a root.
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evaluate the expression
-53
Step-by-step explanation:
[tex] \frac{( { - 8)}^{2} }{5 - 9} - ( - 1)^2 + 4( - 9) \\ = \frac{64}{ - 4} - 1 - 36 \\ = - 16 - 1 - 36 \\ = - 52 - 1 \\ = - 53[/tex]
A drink is made from 1.5 litres of orange juice and 7.5 litres of lemonade. What fraction of the drink is orange juice? (simplest form)
==================================================
Explanation:
1.5 liters of orange juice
7.5 liters of lemonade
1.5+7.5 = 9 liters total
1.5/9 = 15/90 is the fractional amount of orange juice. Note how I multiplied top and bottom of the first fraction by 10 to get 15/90. This is the same as moving the decimal point 1 spot to the right for each value.
----------
From here you divide both parts by the GCF 15 to reduce
15/15 = 1
90/15 = 6
Meaning 15/90 = 1/6
So 1/6 of the drink is orange juice.
The problem has been started for you. 670 StartLongDivisionSymbol 2345.0 EndLongDivisionSymbol minus 2010 to get a remainder of 3350 and a quotient of 3.blank.
Answer:
The answer is 3.5
Step-by-step explanation:
I just got it right on the instruction.
Please help me with this probability Questions Pls Explain Thanks
Answer:
I think it's 1/2
Step-by-step explanation:
32+25 is 60 and the total number of students are 50, meaning 10 offer both, and your question says chemistry only so I guess you'll have to subtract the 10 from the 35.
therefore, 25/50= 1/2.
Write the Pythagorean triplet whose one of the numbers is 4. Explain your method.
Answer:
3,4,5 is the Pythagorean triplet
Step-by-step explanation:
A pythagorean triplet is when you have 3 consecutive numbers (for example 1,2,3 or 9,10,11). So since they've already given one of the numbers you can try doing trial and error to find out(use different combinations like 3,4,5 or 4,5,6) and see whether the Pythagoras theorem applies to it.
Which line is perpendicular to y =
[tex] \frac{x}{2} [/tex]
+1
If [tex]y=\frac{x}{2}+1[/tex] then [tex]y_{\perp}=-2x+1[/tex].
The slope in first line is [tex]1/2=0.5[/tex], therefore the slope of perpendicular line must be [tex]-1/0.5=-2[/tex].
Hope this helps.
Mark is paddling his kayak across a lake at a constant velocity of 64 meters
per minute to the east. He has 15 minutes to finish his trip before it gets
dark. How long will it take Mark to move 480 meters?
Answer:
7.5r minutes
Step-by-step explanation:
480 divided by 64 = 7.5
please help asap!! Thank youu
Answer: Option 2. x≥-78
Step-by-step explanation:
(x/-6)+2≤15
x/-6≤13
x≥-78 ⇔ REMEMBER you need to change the direction of the sign
when you multiply/divide a negative number
Option 2. x≥-78
Hope this helps!! :)
Please let me know if you have any question
Bernard's bird feeder holds 4 1/2 cups of birdseed. Bernard is filling the bird feeder with a scoop that holds 9/10 of a cup. How many scoops of birdseed will Bernard put into the feeder? Write your answer as a fraction or as a whole or mixed number.
Answer:
5 scoops
Step-by-step explanation:
Given
[tex]Feeder = 4\frac{1}{2}[/tex]
[tex]Scoop = \frac{9}{10}[/tex]
Required
Determine the number of scoop in a feeder
To do this, we simply divide the size of the feeder by the size of the scoop as follows;
[tex]Number = \frac{Feeder}{Scoop}[/tex]
[tex]Number = 4\frac{1}{2}/\frac{9}{10}[/tex]
Convert Fractions to improper
[tex]Number = \frac{9}{2}/\frac{9}{10}[/tex]
[tex]Number = \frac{9}{2}*\frac{10}{9}[/tex]
[tex]Number = \frac{9 * 10}{2 * 9}[/tex]
[tex]Number = \frac{90}{18}[/tex]
[tex]Number = 5[/tex]
Hence, there are 5 scoops in a feeder
-5 1/4 + -3 how do you solve this problem
Answer:
8 1/4(Decimal:-8:25)
Step-by-step explanation:
simplify:
-51/4 - 3
=8 1/4 (decimal:-8.25)
Answer:
The answer would be 8 1/4
Step-by-step explanation:
-5 1/4 + (-3)
let's start with the whole numbers:
-5 + (-3) = -8 because it's just like adding positives but add a negative sign
so then we just add the -1/4 and you get -8 1/4
*you have to put the second number in parentheses because its how you properly write the equation Ex: -2+8+(-3)+(-1 5/6)=...
* also note that when you add two negatives it becomes a positive!!!
Choose all the fractions that are equivalent to 1/8 HELP ME A.2/14 B .4/28 C.5/35 D.2/8 E.7/49 F.7/40
Answer:
None of the options seem to be equivalent to 1/8 but A, B, and C all are equivalent.
Step-by-step explanation:
Let's simplify each fraction as much as possible.
A:
2/14 = 1/7
B:
4/28 = 1/7
C:
5/35 = 1/7
D:
2/8 = 1/4
E:
7/49 = 1/7
F:
7/40 (cannot be further simplified)
I think you may have a typo in your question as there are no answers. However if the question is asking for 1/7, the answers are A, B, C, E.
Simplify each of the following:
2
1. (3+4i ) + ( 19 - 5i)
I hope this helps you
(3+19)+(4i-5i)
22-i
Complete the following statement. Write your answer as a decimal or whole number
% of $96 = $72
Answer:
75%
Step-by-step explanation:
let the unknown percent be x.
[tex]\frac{x}{100}*96=72\\\frac{96x}{100}=72\\ 96x=72*100\\96x=7200\\\frac{96x}{96}=\frac{7200}{96}\\ x=75%[/tex]
Answer:
Step-by-step explanation:
x/100 * 96 = 72
96x = 7200
x = 75
The dimension of the rectangle prism show are given in centimeters 4 cm 3 cm 1.4 cm what is the volume of the rectangular prism in the cubic centimeter
Answer:
16.8 cubic centimeter
Step-by-step explanation:
Dimensions of rectangular prism are:
[tex]4\ cm, 3\ cm , 1.4\ cm[/tex]
To find:
The volume of rectangular prism in cubic cm ?
Solution:
The formula for volume of prism is given as:
[tex]V=l\times w\times h[/tex]
Where [tex]l[/tex] is the length of rectangular prism
[tex]w[/tex] is the width of rectangular prism
[tex]h[/tex] is the height of rectangular prism
Here we are given the three dimensions of prism as:
Length, [tex]l[/tex] = 4 cm
Width, [tex]w[/tex] = 3 cm
Height, [tex]h[/tex] = 1.4 cm
Putting the values in formula for volume:
[tex]V=4\times 3\times 1.4\\\Rightarrow \bold{V =16.8\ cm^3}[/tex]
So, volume is 16.8 cubic centimeter.
Answer:
16.8
Step-by-step explanation
(4 cm times 3 cm) = 12 cm times 1.4 = 16.8
hope i got it correct :)
what is the ratio of boys and girls in a classroom of 18 girls and 27 boys
Answer:
2:3Step-by-step explanation:
[tex]18\: girls \\ 27 \:boys\\\\Girls\:: Boys\\18 \: \:\:\:\:\:\:: 27\\\\Use\:3\:to\:divide\:through\\6:9 = 2:3\\[/tex]
there are 12 students in the gym class if 4 students can sit on 1 bench how many benches are needed for all the students
A. 12+4= 16
B. 12×4= 48
C. 12÷4= 3
E. 12-4= 8
Answer:
C. 12÷4= 3 is correct
as in the question 4 students can sit on one bench than 4×3=12 which is equal to the total number of students in class.
Step-by-step explanation:
hope it will help ^_^
3 bench are needed for all students
What is unitary method?The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value
We have
Students in the gym = 12
how many students can sit in 1 bench = 4
Based on the given conditions formulate:
12 ÷ 4 = 3
Hence , 3 bench are needed for all students and option C is correct.
learn more about unitary problem from here
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The half-life of carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 72% of the carbon-14 expected in living matter, when did the tree die?
Answer:
t =2654.01465 year
Step-by-step explanation:
Given that the half-life of carbon-14 is 5600 years and if a piece of charcoal made from the wood of a tree shows only 72% of the carbon-14 expected in living matter.
we know
[tex]y=a(b)^{t/h}[/tex]
where y= final amount
a= initial amount
b= growth/decay
t= time elapsed
h= half time
plugging the values we get
[tex]0.72 =(\frac{1}{2})^{t/5600}\\[/tex]
taking log on both side
log 0.72 = t/5600 log(1/2)
solving we get t =2654.01465 year
Find the mean distance (○｀ 3′○)
Answer:
189.571428571 miles or km
Step-by-step explanation:
Just deduct the last odometer reading with the first one and divide by the number of days,
(11,477-10,150)/7 = 189.571428571
Write a real world problem involving multiplication by a decimal factor then solve the problem
Answer:
See Explanation
Step-by-step explanation:
We start by writing a real world problem
The cost of a pack of candle and a dozen of eggs is $12.5 and $11.3 respectively. If Ridwan intends to buy 2 dozen eggs and half pack of a candle, what should be Ridwan's budget.
Next; is to solve the above problem
We continue by listing out the given parameters
A pack of candle = $12.5
A dozen of egg = $11.3
Required
What is the cost of 2 dozen egg and half pack of candle?
We start by calculating the cost of 2 dozen egg
[tex]Cost = 2 * 1\ dozen\ egg[/tex]
[tex]Cost = 2 * \$11.3[/tex]
[tex]Cost = \$22.6[/tex]
Then, we calculate the cost of half pack of Candle
[tex]Cost = \frac{1}{2} * 1\ pack\ of\ candle[/tex]
[tex]Cost = \frac{1}{2} * \$12.5[/tex]
[tex]Cost = \$6.25[/tex]
Lastly, we add up the two costs;
[tex]Total = \$22.6 + \$6.25[/tex]
[tex]Total = \$28.85[/tex]
find the sum: 9²+ 10²+11²+.........20².
Answer:
2666Step-by-step explanation:
9² + 10² + 11² + ......... 20² =
= 9² + 10² + 11² + 12² + 13² + 14² + 15² + 16² + 17² + 18² + 19² + 20² =
= 81 +100 +121 +144 +169 +196 +225 +256 +289 +324 +361 +400 =
= 2666
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Answer:
It would be B. Fuction 1 has the larger maximum at (4,1)
Step-by-step explanation:
because the maximum point for Fuction 1 is at (4,1) becuase that the highest point/vertex it goes.
You can use a graph to identify the vertex or you can find the minimum or maximum value algebraically by using the formula x = -b / 2a. This formula will give you the x-coordinate of the vertex. Simply replace the x in your original equation with the value of the x-coordinate and then solve for y.
Answer:
It would be B. Fuction 1 has the larger maximum at (4,1) because the maximum point for Fuction 1 is at (4,1) becuase that the highest point/vertex it goes.
Step-by-step explanation:
188= 45 - v = please help solve for v
Answer:
v=-143
Step-by-step explanation:
45-v=188
-v=188-45
-v=143
v=-143
Answer:
Step-by-step explanation:
45 - v = 188
-v = 188 - 45
-v = 143
v = -143
72p-25p compine like terms
Answer:
47p
Step-by-step explanation:
Since both have coefficients times the same variable we can combine like terms
72p-25p
(72-25)p
47p
8x + 2 + 4y; x = 9, y = 2
Answer:
82
Step-by-step explanation:
plug in and multiply
Answer:
Step-by-step explanation:
8x + 2 + 4y
Let x = 9 and y = 2
8*9 + 2 + 4*2
72 + 2+ 8
82
Find the volume of the rectangular prism below.
2 1/2yd
5 3/4yd
8 yd
I hope this helps you
Help please inverse / direct variations problem
Answer:
y = 30
Step-by-step explanation:
y ∝ 1/x
y = k/x → y = 60/x
12 = k/5 y = 60/2
60 = k y = 30
I hope this helped you :)
3k - 2c + 8
use k = 7 and c = 4
Answer:
21
Step-by-step explanation:
3 (7) - 2(4) + 8
21 - 8 + 8
13 + 8
21
Answer:
21
Step-by-step explanation:
3k - 2c + 8
k = 7 and c = 4
Substitute the values of k and c in the algebraic expression
3(7) - 2(4) + 8 = 21 - 8 + 8 = 21
Ramona works in a clothing store where she earns a base salary of $140 per day plus 14% of her daily sales. She works on Saturday and Sunday. Assuming she sells the same amount on both days, how much will her sales have to be each day in order to earn at least $500 over the two days?
A. $1,572
B. $350
C. $648
D. $786
Answer:
A. $1572
Step-by-step explanation:
Saturday and Sunday Base Salary: 140+140 = 280
Subtract Base Salary: 500-280 = 220
Find Percent: (220/14)* x 100 = 1571.43
Round up: 1572
Answer:
A. $1,572
Step-by-step explanation:
She earns $140 per day as her base salary.
And she earns 14% of her daily sales for both days.
So 280 + 1, 292 = 1,572!
Hope dis helps! :P
- Anna
Find the coordinates of the midpoint of a segment with the given
endpoints. S (10, 9), P (8,2) *

Answer:
(9,5.5)
Step-by-step explanation:
Solve & Justify: 7(x + 3) + 9 = 5(x - 2) - 3x
Answer:
x = -8
Step-by-step explanation:
[tex]7(x + 3) + 9 = 5(x - 2) - 3x\\\\\mathrm{Expand\:}7\left(x+3\right)+9:\quad 7x+30\\\\\mathrm{Expand\:}5\left(x-2\right)-3x:\quad 2x-10\\7x+30=2x-10\\\\\mathrm{Subtract\:}30\mathrm{\:from\:both\:sides}\\7x+30-30=2x-10-30\\\\Simplify\\7x=2x-40\\\\\mathrm{Subtract\:}2x\mathrm{\:from\:both\:sides}\\7x-2x=2x-40-2x\\\\Simplify\\5x =-40\\\\Divide both sides by 5\\\frac{5x}{5}=\frac{-40}{5}\\\\Simplify\\x = -8[/tex]
Justification [tex]7(x + 3) + 9 = 5(x - 2) - 3x\\x=-8\\\\7(-8+3)+9=5(-8-2)-3(-8)\\\\\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}\\\\\mathrm{Calculate\:within\:parentheses}\:\left(-8+3\right)\::\quad -5\\=7\left(-5\right)+9\\\\=-35+9\\\\=-26\\\\5\left(-8-2\right)-3\left(-8\right)\\\\Follow\:the\:PEMDAS\:order\:of\:operations\\\\\mathrm{Calculate\:within\:parentheses}\:\left(-8-2\right)\::\quad -10\\=5\left(-10\right)-3\left(-8\right)\\\\=-50-3\left(-8\right)\\\\=-50-\left(-24\right)\\\\=-26\\[/tex][tex]-26 =-26[/tex]