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2 years ago

The perimeter of a

Mathematics

1 answer:

Umnica [9.8K]2 years ago

7 0

Answer:

The longest side is 16 cm

Step-by-step explanation:

$x + (x + 2) + (x + 4) = 42cm \\ x + x + 2 + x + 4 = 42cm \\ 3x + 6 = 42cm \\ 3x = 36cm \\ x = 12$

check and finish

$12 + (12 + 2) + (12 + 4) = 42cm \\ 12 + 12 + 12 + 6 = 42 cm\\ 36 + 6 = 42cm \\ 42cm = 42cm$

lengths of sides

$12 + 4 = 16cm \\ 12 + 2 = 14cm \\ 12cm$

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Mamont248 [21]

Answer:

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Step-by-step explanation:

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4 years ago

What is the answer 3x+(x-8)=120

Yuliya22 [10]

Combine like terms.

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Add 8 to both sides.

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Divide by 4 into both sides.

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4 years ago

What’s is the area of a square that has the side length of 4 square root 5

Zepler [3.9K]

Answer:

Step-by-step explanation:

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3 years ago

Please help

Firdavs [7]

Answer:

(–10, –2), (6, 6)

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

Verify each case

case 1) (5, –4), (–2, 1)

substitute in the formula

$m=\frac{1-(-4)}{-2-5}$

$m=\frac{1+4}{-2-5}$

$m=\frac{5}{-7}$

$m=-\frac{5}{7}$ ----> the slope is negative

case 2) (6, –10), (2, 10)

substitute in the formula

$m=\frac{10-(-10)}{2-6}$

$m=\frac{10+10}{2-6}$

$m=\frac{20}{-4}$

$m=-5$ ----> the slope is negative

case 3) (–10, –2), (6, 6)

substitute in the formula

$m=\frac{6-(-2)}{6-(-10)}$

$m=\frac{6+2}{6+10}$

$m=\frac{8}{16}$

$m=0.5$ ----> the slope is positive

case 4) (5, –1), (–6, 6)

substitute in the formula

$m=\frac{6-(-1)}{-6-5}$

$m=\frac{6+1}{-6-5}$

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$m=-\frac{7}{11}$ ----> the slope is negative

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3 years ago

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Licemer1 [7]

Answer:

Step-by-step explanation:

322+63 ?= 0

385≠0

False

7 0

4 years ago