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3 years ago

What is 15-5(4x-7)=50

Mathematics

1 answer:

katovenus [111]3 years ago

5 0

Simplifying

15 + -5(4x + -7) = 50

Reorder the terms:

15 + -5(-7 + 4x) = 50

15 + (-7 * -5 + 4x * -5) = 50

15 + (35 + -20x) = 50

Combine like terms: 15 + 35 = 50

50 + -20x = 50

Add '-50' to each side of the equation.

50 + -50 + -20x = 50 + -50

Combine like terms: 50 + -50 = 0

0 + -20x = 50 + -50

-20x = 50 + -50

Combine like terms: 50 + -50 = 0

-20x = 0

Solving

-20x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '-20'.

x = 0.0

Simplifying

x = 0.0

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There are 300 students. for every 8 are boys, and for every seven are girls. how many boys?

katen-ka-za [31]

8+7=15
300/15=20
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7 x 20 = 140 girls

140 + 160 = 300

Hope this helps!

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3 years ago

Translate the phrase into an expression: 11 more than one third of a number

skelet666 [1.2K]

1/3x+11.
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We can represent 11 more as +11.
This, our expression is 1/3x+11

Hope this helps!

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3 years ago

Why can u call y = mx + b a “literal” equation?

inessss [21]

Answer:

Equations made up of multiple variables like formulas.

Step-by-step explanation:

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3 years ago

Lucy is using a one-sample t ‑test based on a simple random sample of size n = 22 to test the null hypothesis H 0 : μ = 16.000 c

slega [8]

Answer:

The value of test statistic is 1.338

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 16.000

Sample mean, $\bar{x}$ = 16.218

Sample size, n = 22

Alpha, α = 0.05

Sample standard deviation, s = 0.764

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 16.000\text{ cm}\\H_A: \mu < 16.000\text{ cm}$

We use one-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{16.218 - 16.000}{\frac{0.764}{\sqrt{22}} } = 1.338$

Thus, the value of test statistic is 1.338

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4 years ago

18 is 75% of what number?

Nonamiya [84]

Answer:

Step-by-step explanation:

18 * 4 /3 = 72/3 = 24

8 0

3 years ago

Read 2 more answers