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Alik [6]
3 years ago
15

Help me pleaseee i will mark brain

Mathematics
1 answer:
mariarad [96]3 years ago
4 0
The correct answer is C
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PLZ HELP IF CORRECT ILL GIVE U BRAINLIEST
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Answer:

32.25

Step-by-step explanation:

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3 years ago
a force of 2 pounds is needed to stretch a spring 8 inches.what force is required to stretch the spring 16 inches
Korvikt [17]

Answer:

Four (4) pounds

Step-by-step explanation:

Because we required two (2) pounds to stretch the spring eight (8) inches, we need double the force to stretch it sixteen (16) inches. Sixteen is just double the original amount, meaning we need four (4) pounds to stretch the spring sixteen inches.

Hope this helps!

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4 years ago
A survey asked two age groups which summer sport they most preferred. The results are shown in the table below.
Vlada [557]

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The most prefered sport was hiking and the relative frequency was 123

Step-by-step explanation:

Relative frequency is basically how many times this happened

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3 years ago
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3 years ago
Write the equation of the line that is perpendicular to 3x + 7y = 15 and passes through (4, 9)
k0ka [10]

Answer:

7x - 3y = 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange 3x + 7y = 15 into this form

Subtract 3x from both sides

7y = - 3x + 15 ( divide all terms by 7 )

y = - \frac{3}{7} x + \frac{15}{7} ← in slope- intercept form

with slope m = - \frac{3}{7}

Given a line with slope m the the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{-\frac{3}{7} } = \frac{7}{3}, thus

y = \frac{7}{3} x + c ← is the partial equation of the line

To find c substitute (4, 9) into the partial equation

9 = \frac{28}{3} + c ⇒ c - \frac{1}{3}

y = \frac{7}{3} x - \frac{1}{3} ← in slope- intercept form

Multiply through by 3

3y = 7x - 1 ( subtract 3y from both sides )

0 = 7x - 3y - 1 ( add 1 to both sides )

1 = 7x - 3y, that is

7x - 3y = 1 ← in standard form

4 0
3 years ago
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