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3 years ago

The amount 6.40 is 4% of what price

Mathematics

2 answers:

enot [183]3 years ago

5 0

Answer:

Step-by-step explanation:

lys-0071 [83]3 years ago

4 0

Answer:

160

Step-by-step explanation:

6.4 = 0.04x

6.4 / .04 = 160

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2 years ago

How to find the point-slope form for the slope of 6 and passing through(-7,1)

MariettaO [177]

Answer: y-1=6(x+7)

Step-by-step explanation:

The formula for point-slope form is $y-y_1=m(x-x_1)$ . Since we are given the point and slope, we can directly plug them in.

$y-1=6(x-(-7))$ [distribute by -1]

$y-1=6(x+7)$

Now, we know that the point-slope form is y-1=6(x+7).

8 0

2 years ago

A triangle has a base of 5 centimeters and a height of 8 centimeters.

Aleks04 [339]

Answer:

C. 20 cm^2 is the area. Hope this helped you.

6 0

2 years ago

Read 2 more answers

Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of tim

DaniilM [7]

Answer:

$t = 0.875$

Step-by-step explanation:

Given

<u>Brand A</u> <u>Brand B</u>

$n_ 1= 12$ $n_2 = 12$

$\bar x_1 = 21.8$ $\bar x_2 = 18.9$

$\sigma_1 = 8.7$ $\sigma_2 = 7.5$

Required

Determine the test statistic (t)

This is calculated as:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

Calculate s using:

$s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}$

The equation becomes:

$s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}$

$s = \sqrt{\frac{1451.34}{22}}$

$s = \sqrt{65.97}$

$s = 8.12$

So:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}$

$t = \frac{21.8 - 18.9}{8.12 * 0.408}}$

$t = \frac{2.9}{3.31296}}$

$t = 0.875$

3 0

2 years ago

Julio says "If you subtract 13 from my number and multipy the difference by -3 the result is -45" what is Julio's number

ICE Princess25 [194]

Answer:28

Step-by-step explanation:

Julio's number is x

(X-13)*-3=-45

Divide by -3

X-13=15

Add13 to both sides

x=28

6 0

2 years ago