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4 years ago

70 = -7 k solve the equations

Mathematics

2 answers:

wolverine [178]4 years ago

4 0

Answer:

-10

Step-by-step explanation:

70= -7k

70 -7k

-- --

-7 -7

-10=k

Have a great day

UkoKoshka [18]4 years ago

3 0

Answer:

k= -10

Step-by-step explanation:

70= -7k

Divide both sides by -7

-7k/-7 = 70/7

Simplify

k=-10

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eric has a summer lawn mowing buisness. based on experience eric knows that p= -3x^2 + 150x -1200 models his profit, p, in dolla

mezya [45]

Answer:

Eric can either charge $10 or $40 in order to break even.

Step-by-step explanation:

Eric has a summer lawn mowing business and the equation:

$p=-3x^2+150x-1200$

Models his total profit p by charging x dollars per lawn.

We want to determine what price Eric needs to charge in order to break even.

The price Eric charges to break even means that his total profit will be zero. Hence, we can let p = 0 and solve for x. Thu:

$0=-3x^2+150x-1200$

We can divide both sides by -3:

$0=x^2-50x+400$

Factor:

$0=(x-10)(x-40)$

Zero Product Property:

$x-10=0\text{ or } x-40=0$

Solve for each case. Hence:

$x=10\text{ or } x=40$

Therefore, Eric can either charge $10 or $40 in order to break even.

6 0

3 years ago

An article measured speeds of vehicles on several roads in the state of Kansas. On South Cedar Niles, 73 vehicles were observed,

shutvik [7]

Answer:

The $p-$ value is $0.2996$ .

Step-by-step explanation:

This is a right-tailed test.

The null and alternative hypothesis is

$H_0:p=0.60\\H_a:p>0.60$

Point estimate $=$ sample proportion $=\hat{P}=x/n=0.630$

Test statistics

$z=\left(\hat{p}-p_{0}\right) / \sqrt{p}_{0^{*}}\left(1-p_{0)} / n\right.$\\$=(0.630-0.60) / \sqrt{(0.60 * 0.40) / 73}$\\$=0.526$\\P-value $=P(Z>z)$\\$=0.2996$\\The $\mathrm{P}$ -value is $0.2996$

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3 years ago

Which of the following numbers is rational but NOT an integer? (A--9) (B-4.3) (C-0) (D-3) [Explain]

slamgirl [31]

First read is decimal digits as a Integer N, ignoring the decimal point. The answer is B(4.3)

5 0

4 years ago

A line passes through the points (4,6) and (6,2) .

siniylev [52]

ANSWER

Yes

No

No

Yes

EXPLANATION

The given line passes through the points,.
$(4,6) \: and \: (6,2)$

We need to determine the slope of this line using these two points.

The formula for finding the slope is

$m=\frac{y_2-y_1}{x_2-x_1}$

$m = \frac{2 - 6}{6 - 4} = - \frac{ - 4}{2} = - 2$

We can now use the formula

$y-y_1=m(x-x_1)$
in the slope intercept form.

If we use the point
$(4,6)$
the equation will be,

$y - 6 = - 2(x - 4)$

If we use the point,

$(6,2)$
we obtain,
$y - 2 = - 2(x - 6)$

6 0

3 years ago

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What type of display would you use to show the number of wins the school volleyball team had from 2000 to 2005

Agata [3.3K]

I'd use line chart, percentage or real number. Hope this helps

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4 years ago