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2 years ago

7n + 6(n+4) -15 how do i solve this with a step by step example

Mathematics

1 answer:

GrogVix [38]2 years ago

8 0

Answer:

13n +9

Step-by-step explanation:

There is nothing to solve. We can simplify the expression by eliminating parentheses and combining like terms.

7n +6(n +4) -15 . . . . . . given

7n +6n +6(4) -15 . . . . use the distributive property

(7 +6)n +(24 -15) . . . .identify and group like terms

13n +9 . . . . . . . . . . combine like terms

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A right cone has a surface area of 440 square inches and a radius of 7 inches. Find its slant height.

EastWind [94]

Answer:

Surface Area of right cone

= $\pi r(r+\sqrt{h^2 + r^2}$

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$\frac{286.062}{21.99} =\sqrt{h^2+49}\\\\13.0087= \sqrt{h^2+49}\\\\(13.0087)^2 = (\sqrt{h^2+49})^2\\\\169.227 = h^2 +49\\\\169.227 - 49 =h^2\\\\120.227 = h^2\\\\h = \sqrt{120.227} = 10.96in$

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2 years ago

Round 48.078 to the nearest tenth

nasty-shy [4]

Answer:

Step-by-step explanation:

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3 years ago

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What is the equation of a line that passes through the point(3,-8)and has a slope of 0?

hram777 [196]

Answer: y=-8

Step-by-step explanation:

If the slope is zero that means that the line does not go up (or have any rise) and therefore must be a horizontal line. Since it passes through the point (3,-8), the equation has to be y=-8.

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2 years ago

How many numbers bewteen 50 and 150 have at least one digit that is 2

mr Goodwill [35]

Answer:

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Step-by-step explanation:

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2x+3y=15 x+y=6 find values for x and y

MatroZZZ [7]

Answer:

(x, y) = (3, 3)

Step-by-step explanation:

Subtract double the second equation from the first.

(2x +3y) -2(x +y) = (15) -2(6)

y = 3 . . . . . . . . simplify

Use the second equation to find x.

x = 6 -y = 6 -3 = 3

The values of x and y are both 3.

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2 years ago