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3 years ago

Find the perimeter. Simplify your answer.

Mathematics

1 answer:

hodyreva [135]3 years ago

3 0

Answer:

6z-30 :D

Step-by-step explanation:

Step-by-step explanation:

The perimeter of a square is just all the sides added up together. To do this we can make an equation.

2(z-5) + 2(2z - 10)

This represents two sides with different lengths two times. To solve, you first use the distributive property to multiply z-5 by 2.

2z - 10 + 2(2z - 10)

We then use the distributive property by multiplying 2z - 10 by 2.

2z − 10 + 4z − 20

We then combine 2z and 4z to get 6z.

6z − 10 − 20

Subtract 20 from 10 to get -30.

6z-30.

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Nastasia [14]

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3 years ago

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Kruka [31]

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3 years ago

julie buys 2kg of apples and 7kg of pears £12.70. the pears cost £1.30 per kilogram what is the price per kilogram of the apples

Maru [420]

1.44 per kg

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4 years ago

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Jack bought 24 apples at the farm stand. He divided the apples between his brother, his friend, and himself in a ratio of 2:1:3.

Fed [463]

Answer: 8,4, and 12

Step-by-step explanation:

Given

Jack bought 24 apples and divided them in the ratio of 2:1:3.

Suppose they get the number of apples as $2x,x,3x$ such that their ratio remains the same

$\therefore 2x+x+3x=24\\\Rightarrow 6x=24\\\Rightarrow x=4$

So, each person gets

$2x=2\times 4=8\\x=4\\3x=3\times 4=12$

4 0

3 years ago

God, somebody help me!!!

cestrela7 [59]

Answer:

Step-by-step explanation:

When solving proportions like these, you can set them up using fractions

#1:

$\frac{3}{9} = \frac{2}{x}\\\frac{1}{3} = \frac{2}{x}\\cross \: multiply\\x = 6\\3:9 = 2:6$

#2:

$\frac{57}{x} = \frac{19}{38}\\\frac{57}{x} = \frac{1}{2} \\x = 114\\57 : 114 = 19 : 38$

#3:

$\frac{7}{x} = \frac{2}{3} \\21 = 2x\\x = \frac{21}{2} = 10.5\\7:10.5 = 2:3$

$\frac{15}{2} = \frac{x}{8}\\x = \frac{15*8}{2} = 60\\15:2 = 60:8$

$\frac{0.3}{4} = \frac{9}{x}\\0.3x = 36\\x = \frac{36}{0.3} = 120 \\0.3:4 = 9:120$

5 0

3 years ago