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3 years ago

Name the property illustrated by the following. (a) x + (-x) = 0; (b) x + (-y) = -y + x

Mathematics

1 answer:

Mama L [17]3 years ago

8 0

Answer:

Step-by-step explanation:

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Given f (x) = -12x + 72, find x when f(x) = 24.

Neko [114]

Answer:

x = 4

Given:

f(x) = -12x + 72

f(x) = 24

Step-by-step explanation:

$= > - 12x + 72 = 24 \\ \\ = > - 12x = 24 - 72 \\ \\ = > \cancel{- }12x = \cancel{-} 48 \\ \\ = > 12x = 48 \\ \\ = > x = \frac{48}{12} \\ \\ = > x = 4$

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2 years ago

Write an expression that represents the value, in cents, if n nickels.

Mademuasel [1]

1, 10, 25, 50, and so on...

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2 years ago

QUESTION 21 ✓ Round 5 1/3 to the nearest whole number?<br>

wariber [46]

Answer:

Step-by-step explanation:

1/3 is only 0.33 and 0.33 isnt higher than 0.50, so you cant round anything. 5 is the answer.

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1 year ago

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Please help 100 points

muminat

Answer:

Type that out please I can't read it sideways

Step-by-step explanation:

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2 years ago

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Four time a number r plus half a number s equals 12. Twice the number r plus one fourth of the numbers s equals 8. What are the

Snezhnost [94]

The system of equations have no solution.

Explanation:

The equations are $4r+\frac{1}{2}s=12$ and $2r+\frac{1}{4} s=8$

To find the two numbers, let us solve the equations using substitution method.

From the equation $2r+\frac{1}{4} s=8$ , let us determine the value of r,

$\begin{aligned} 2 r+\frac{1}{4} s &=8 \\ 2 r &=8-\frac{1}{4} s \\ r &=\frac{1}{2}\left(8-\frac{1}{4} s\right) \\ r &=4-\frac{1}{8} s \end{aligned}$

Let us substitute the value of r in $4r+\frac{1}{2}s=12$ , we get,

$\begin{aligned} 4\left(4-\frac{1}{8} s\right)+\frac{1}{2} s &=12 \\ 16-\frac{1}{2} s+\frac{1}{2} s &=12 \\ 16 &=12 \end{aligned}$

which is not possible.

This means that the system has no solution.

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3 years ago