3 years ago

First problem there are 11

Mathematics

2 answers:

Verdich [7]3 years ago

8 0

Answer:

A) Check the first two: 2(x+5) and 2(x) + 2(5)

B) Check the last one: 14y + 2

miv72 [106K]3 years ago

6 0

The first one for A and the first and last one for B

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11Alexandr11 [23.1K]

Answer:

] y=x-4

-2x+y=18

y - x = -4

y - 2x = 18

equation [2] for the variable y

[2] y = 2x + 18

// Plug this in for variable y in equation [1]

[1] (2x+18) - x = -4

[1] x = -22

// Solve equation [1] for the variable x

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// By now we know this much :

y = 2x+18

x = -22

// Use the x value to solve for y

y = 2(-22)+18 = -26

Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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3 years ago

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marin [14]

Answer: 0

Step-by-step explanation:

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[7 +3] -9

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3 years ago

How many centimeters are in 32 inches?

Anettt [7]

Step-by-step explanation:

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3 years ago

The density of a certain material is such that it weighs 71 pounds for every 2.5 gallons of volume. Express this density in tons

kvasek [131]

Answer:

$d=3.75\ \text{tons per cubic meter}$

Step-by-step explanation:

Given that,

Mass of a certain material, m = 71 pounds

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Since, 1 m³ = 264.172 gallon

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Density,

$d=\dfrac{m}{V}\\\\d=\dfrac{0.0355\ \text{tons}}{\dfrac{2.5}{264.172}\ m^3}\\\\d=3.75\ \text{tons per cubic meter}$

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3 years ago