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2 years ago

Which fractions are equivalent to 4/5 and 2/7

Mathematics

1 answer:

8090 [49]2 years ago

5 0

Answer: b

Step-by-step explanation:

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X^2 - y^2 = 100

luda_lava [24]

Answer:

Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

$x+y=5$

Subtract y from both sides:

$x=5-y$

Now, substitute "5-y" for "x" in the first equation:

$(5-y)^2-y^2=100$

Note that:

$(a-b)^2=a^2-2ab+b^2$

$25-10y+y^2-y^2=100$

Cancel out like terms:

$25-10y=100$

Subtract 25 from both sides:

$-10y=75$

Divide both sides by -10

$y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}$

Now, substitute this value back into either of the equations to solve for x.

$x+y=5\\x-\frac{15}{2}=5\\$

Add 15/2 to both sides:

$x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}$

Now, find the difference:

$x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20$

8 0

2 years ago

Please help with this.I need more comparing parts and all of the corresponding parts.

Andrew [12]

Not sure about the statement
movement down 5 units
move right 2 units

3 0

3 years ago

Convert 6 liters to quarts

maksim [4K]

Answer:

6.34013 quarts

Step-by-step explanation:

i looked it up

4 0

3 years ago

Read 2 more answers

Explain how you know that the some of 12.6, 3.1, and 5.4cis greater than 20

ddd [48]

You can add the numbers together so:

12.6
3.1
+ 5.4
 21.1

Since the sum of the numbers is 21.1, it is greater than 20

8 0

2 years ago

Pls help will mark brainliest

tatuchka [14]

Answer: subtract 10

Step-by-step explanation: 25 - 10 =15

5 0

2 years ago