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3 years ago

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Mathematics

1 answer:

nika2105 [10]3 years ago

4 0

I think the answer is 16, hope that helps

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The perimeter of a rectangle is the same as the

Alex_Xolod [135]

Answer:

a. 20

b. 25

Step-by-step explanation:

Let find the side lengths of the rectangle,

We can complete the square.

${x}^{2} + 4x - 21$

${x}^{2} + 4x = 21$

${x}^{2} + 4x + 4 = 25$

$(x + 2) {}^{2} = 25$

$(x + 2) = 5$

$x = - 7$

$(x + 7)$

$x = 3$

$(x - 3)$

This means the perimeter of is

2 times -7 equal 14

2 times 3 equal 6

14+6=20.

The side lengths of the square is equal so each side length will measure 5.

${5}^{2} = 25$

7 0

3 years ago

The box plots show the high temperatures in January and March for Denmark in degrees Fahrenheit. Box plots titled Average Daily

bazaltina [42]

Answer:

The mean temperature for March is higher than January's mean.

Step-by-step explanation:

I took the test. trust me and you will be set free ;D

3 0

3 years ago

En una tienda de electrodomésticos, un refrigerador costaba $8,900 y rebajaron su precio a $7,120 ?Cuál fué el porcentaje que le

Mamont248 [21]

Answer:

$20\%$

Step-by-step explanation:

The question in English is

In one appliance store, a refrigerator cost $8,900 and they lowered it to $7,120. What percentage did they lower?

we know that

$8,900 ------> represent the 100%

by proportion

$\frac{100\%}{\$8,900}=\frac{x\%}{\$7,120}\\ \\x=7,120*(100\%)/8,900\\ \\x=80\%$

therefore

the percentage is equal to

$100\%-80\%=20\%$

7 0

3 years ago

What is the solution set for the inequality Negative one-fourthx2(x – 4)(x +5) ≤ 13?

Kitty [74]

Answer:

Step-by-step explanation:

7 0

3 years ago

Express the ratio below in its simplest form 15:12:6

Ede4ka [16]

Answer:

5:4:2

Step-by-step explanation:

To put it in the simplest form, divide by the GFC, or greatest common factor.

~theLocoCoCo

5 0

4 years ago