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amm1812
2 years ago
8

Add or subtract the following fractions. write in simplest form.3/4 - 3/10​

Mathematics
1 answer:
Burka [1]2 years ago
7 0

Answer:

I got 9/20

Hope that helps!

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If x+y=5,x-y=4,find the value of x²-y²​
inysia [295]

Answer:

20

Step-by-step explanation:

→ First find the value of x and y

x + y = 5

x - y = 4

→ Add the equations to cancel out the y's

2x = 9

→ Divide both sides by 2 to find the value of x

x = 4.5

→ Substitute x = 4.5 back into x - y = 4 to find the value of y

4.5 - y = 4

→ Minus 4.5 from both sides to isolate -y

-y = -0.5

→ Multiply everything by -1

y = 0.5

→ Substitute x = 4.5 and y = 0.5 into x² - y²

4.5² - 0.5² = 20.25 - 0.25 = 20

4 0
3 years ago
Cristina bought a bag of coffee for $8.47. The weight of the bag was 7/8 of a pound. What was the price, per pound, of the coffe
SpyIntel [72]
~For this problem, you need to divide. 
~The easy way that I think might help you is if you change the fraction into a decimal. 
 
\frac{7}{8} = 0.875
  
Now divide $8.47 by 0.875
\frac{8.47}{0.875} = 9.68
     
     The price per pound of the coffee was $9.68

5 0
3 years ago
Read 2 more answers
Find the surface area of the box with dimensions 125mm×64mm×84mm to the nearest mm?
Contact [7]

Answer:

hi

Step-by-step explanation:

you should eat more sushi because it will help you digest food better! just letting you know to help you and make you feel healthy!

xoxo

5 0
2 years ago
What is the value of x:<br><br> 2 + x = 8
klio [65]
6

2+x=8
Subtract 2 on both sides
x=6
5 0
3 years ago
Read 2 more answers
Kayla ran from her home to a beach at a speed of 6 meters per second. the distance from her home and the beach was 756 meters. A
german
Looking at the units, 756 meters divided by 6 m/s will give you the seconds that you need.

So for A) 756/6 = 126

For B, you take the answer from A, and subtract 18 seconds, which would make it 108.  Then you take the distance, 756 and divide by 108, that will be the speed.
5 0
3 years ago
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