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3 years ago

1 yard of fabric costs $3.25. If you need 4.2 yards, how much will it

Mathematics

1 answer:

spin [16.1K]3 years ago

8 0

Answer:

12.50$

Step-by-step explanation:

3 dollars for 1 yard

3x4=12

.25x2=50

12.50$

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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

Pls help me is this right red devil is killing me

Pie

Answer:

6x^2-48x-29

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Find all the powers of 4 in the range 4 through 1,000.

alina1380 [7]

4 to the 1st is 4
4 to the 2nd is 16
4 to the 3rd is 64
<span>4 to the 4th is 256

hope that helps</span>

6 0

2 years ago

1. 25% of what is 16 2. 76 is what percent of 80

Allisa [31]

1.64
2. 95%
Hope this helps you.

6 0

2 years ago

8 more than twice a number is greater then -14

zepelin [54]

Answer:

x>-11

Step-by-step explanation:

2x+8>-14

2x>-14-8

2x>-22

x>-22/2

x>-11

4 0

2 years ago