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3 years ago

Use substitution to solve the linear system of equations.

1 answer:

5 0

5x - y = 15 (1)
-10x+2y=-30 (2)

multiply (1) by 2

10x - 2y = 30
-10x + 2y = -30 (2)
---------------------------add
0 = 0

answer
infinitely many solutions

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What is the best way to estimate the quotient of 7,713 divided by 18

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Answer:

Find the number which when divided by 35 gives the quotient 20 and remainder 18.

Step-by-step explanation:

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3 years ago

whole milk is 4% butterfat how much skim milk with 0% butterfat should be added to 32 ounces of whole milk to obtain a mixture t

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Answer:

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3 years ago

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Answer:

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3 years ago

I don't understand this, at all.

VARVARA [1.3K]

You have to figure out the top first and that answer is what you wil be dividingt the bottom answer from....

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3 years ago

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What is the mass of an object that has a density of 1.3 g/cm3 and a volume

tangare [24]

Answer:

The mass of the object is 2.6 grams

Step-by-step explanation:

The density of an object is the ratio between its mass and its volume

The equation of the is d = $\frac{m}{V}$ , where

m is the mass

V is the volume

Let us use this equation to solve the question

∵ An object has a density of 1.3 g/cm³

∴ d = 1.3 g/cm³

∵ Its volume is 2 cm³

∴ V = 2 cm³

→ Substitute them in the equation of the denisty above

∵ 1.3 = $\frac{m}{2}$

→ Multiply both sides by 2

∴ 2 × 1.3 = 2 × $\frac{m}{2}$

∴ 2.6 = m

∴ The mass of the object is 2.6 grams

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3 years ago