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3 years ago

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2x-3y=8, 4x+2y-10. Solve the system of equations algebraically

1 answer:

Zielflug [23.3K]3 years ago

4 0

Answer:

2x-3y=8

2(x+y)=8

x+y=8/2

x+y=4 ????

4x+2y-10= 2(2x+y-5)

Step-by-step explanation:

im not sure

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3 years ago

Answer part 1 and part 2 please I need help

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Step-by-step explanation:

<u>Step 1: Answer the first question</u>

Area of a triangle → $A = \frac{b*h}{2}$

$\frac{4*6}{2}$

$\frac{24}{2}$

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Total Area → $12 * 2=24$

Answer: Option D, $24\ square\ units$

<u>Step 2: Answer the second question</u>

We know that the total side length is 12 but we also know that the triangle base is 4 so we would subtract that from the total length and we get that the rectangle length is 8. We also know that the width is 6 so we multiply 8 by 6 and we add 24. This matches option B

Answer: Option B, $(8 * 6 + 24)\ square\ units$

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3 years ago

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4 years ago

section of a pipe's length and weight are in proportion. If 2.5 m of pipe weighs 10 kg, then A) 5 m of pipe weighs 30 kg. B) 5 m

motikmotik

We will proceed to resolve each case to determine the solution.

we know that

$2.5$ m of pipe weighs $10$ kg

so

by proportion

<u>Find the weighs of each case</u>

<u>case A)</u> $5$ m of pipe weighs $30$ kg

$\frac{10}{2.5}\frac{kg}{m}=\frac{x}{5}\frac{kg}{m}\\ \\2.5*x=5*10\\ \\x=50/2.5\\x=20\ kg$

$20\ kg\neq30\ kg$

therefore

The statement case A) is False

<u>case B)</u> $5$ m of pipe weighs $40$ kg

$\frac{10}{2.5}\frac{kg}{m}=\frac{x}{5}\frac{kg}{m}\\ \\2.5*x=5*10\\ \\x=50/2.5\\x=20\ kg$

$20\ kg\neq40\ kg$

therefore

The statement case B) is False

<u>case C)</u> $10$ m of pipe weighs $40$ kg

$\frac{10}{2.5}\frac{kg}{m}=\frac{x}{10}\frac{kg}{m}\\ \\2.5*x=10*10\\ \\x=100/2.5\\x=40\ kg$

$40\ kg=40\ kg$

therefore

The statement case C) is True

<u>case D)</u> $10$ m of pipe weighs $80$ kg

$\frac{10}{2.5}\frac{kg}{m}=\frac{x}{10}\frac{kg}{m}\\ \\2.5*x=10*10\\ \\x=100/2.5\\x=40\ kg$

$40\ kg\neq80\ kg$

therefore

The statement case D) is False

therefore

<u>the answer is</u>

$10$ m of pipe weighs $40$ kg

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3 years ago

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Question 1. 3x + 5 = − x − 7<br><br> question 2. 9f − 11 = 4 + 14f

KengaRu [80]

Answer:

Step-by-step explanation:

1. 4x + 5 = -7

4x = -12

x = -3

2. 9f - 11 = 4 + 14f

-5f - 11 = 4

-5f = 15

f = -3

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3 years ago