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3 years ago

Please help 5 rate pleaseeeeeee????//

Mathematics

1 answer:

gayaneshka [121]3 years ago

5 0

Step-by-step explanation:

5/2K+1+1/3K-3/4= 17/6K + 1/4

-Plug in the rest of the equations to check if they are the same.

1. equivalent

2.Not

3.Not

4.Not

5.Not

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Sam ordered 2 tons of crushed stone. How many pounds of crushed stone does she have?

Fudgin [204]

Answer:

4000

Step-by-step explanation:

1 ton = 2000 pounds

2 tons = ? pounds

Multiply:

2000 × 2 = 4000

There will be 4000 pounds of crushed stone.

Hope this helped.

7 0

3 years ago

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F(x) = 3x + 5 g(x) = 4x² – 2 h(x) = x - 3x + 1 Find f(x) – g(x) - h(x).

drek231 [11]

Answer:

- 5x² + 6x + 6

Step-by-step explanation:

f(x) - g(x) - h(x)

= 3x + 5 - (4x² - 2) - (x² - 3x + 1) ← distribute parenthesis

= 3x + 5 - 4x² + 2 - x² + 3x - 1 ← collect like terms

= - 5x² + 6x + 6 ← in standard form

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3 years ago

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A recent study by Ohio State University reported at Science Daily suggests that students with cell phones may take more risks th

777dan777 [17]

Answer:

The value of the test statistic z for this hypothesis test is -2.79

Step-by-step explanation:

Consider the provided information.

To calculate the test statistic use the formula:

$z=\frac{\hat p-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}$

Where, z is Test statistics, n is Sample size, p₀ = Null hypothesized value and $\hat p$ = Observed proportion.

p₀ = 0.50

Thus 1-p₀= 0.50

42% responded that if they had a cell phone, thus $\hat p=0.42$

The sample size is 305.

Substitute the respective values in the above formula.

$z=\frac{0.42-0.50}{\sqrt{\frac{0.50(0.50)}{305}}}$

$z=\frac{-0.08}{\sqrt{0.00082}}$

$z=-2.79$

Hence, the value of the test statistic z for this hypothesis test is -2.79

4 0

3 years ago

Rewrite the equation so that it does not have fractions. 3/4x-4=5/6 Also can you reply asap and help me with other problems?

horsena [70]

0.75x-4=0.83
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8 0

3 years ago

Find the value for the variable that makes the expression undifined. X2 -9 X2-7x+10

Anika [276]

an equation is undefined, when its denominator is 0, or turns to 0, because we can't divide anything by 0.

so let's simply set the denominator of this one = 0.

$\bf x^2-7x+10=0\implies (x-2)(x-5)=0\implies x= \begin{cases} 2\\ 5 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{(2)^2-9}{(2)^2-7(2)+10}\implies \cfrac{-5}{-10+10}\implies \cfrac{-5}{0}\leftarrow und efined \\\\\\ \cfrac{(5)^2-9}{(5)^2-7(5)+10}\implies \cfrac{16}{-10+10}\implies \cfrac{16}{0}\leftarrow und efined$

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3 years ago