39,13,8,10,2 The sum

Mathematics

2 answers:

Bumek [7]4 years ago

5 0

I thank is 156

Step-by-step explanation:

velikii [3]4 years ago

3 0

It would be 72 because you add them together

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Use an equation to find the value of k so that the line passing through (−4,k) and (6,−7) has a slope of −1/5.

Virty [35]

Answer:

k = -5

Step-by-step explanation:

Hi there!

$m=\displaystyle \frac{y_2-y_1}{x_2-x_1}$ where the two points are $(x_1,y_1)$ and $(x_2,y_2)$

Plug in the given information:

$\displaystyle -\frac{1}{5}= \displaystyle \frac{-7-k}{6-(-4)} \\\\\displaystyle -\frac{1}{5}= \displaystyle \frac{-7-k}{6+4} \\\\\displaystyle -\frac{1}{5}= \displaystyle \frac{-7-k}{10} \\\\\displaystyle -\frac{2}{10}= \displaystyle- \frac{-7-k}{10} \\\\-2=-7-k\\k=-5$

I hope this helps!

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3 years ago

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HELP 50 PTS

lana [24]

Step-by-step explanation:

log(7x³/z) = log(7) + log(x³) - log(z).

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3 years ago

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Find the surface area of a pyramid with base sides of 2.5 inches and a slant height of 3 inches.

Alinara [238K]

Hello!

The formula to find the surface area of a pyramid is as follows:
$\frac{1}{2}$ pl + B

In this formula p represents the perimeter of the pyramid's base, l is the slant height, and B is the area of the base.

So, we know that the length of the base sides is 2.5 inches and the slant height (or l) is 3 inches.

The first thing we can do is solve for p or the perimeter of the base. To find the perimeter, you can either add up each of the sides or since it's a square just multiply the side length by 4; both of these options will give you the same answer.
2.5+2.5+2.5+2.5 = 10 2.5*4 = 10
So, we now know that p = 10 inches.

Next, we can solve for B or the area of the base. To do this, we take the length of the base * the width of the base, or in this case just 2.5*2.5; this gives us 6.25 inches
We now have the value of B which is 6.25 inches.

Now that we have all the elements, we can plug the values into the formula!

So, the formula originally is $\frac{1}{2}$ pl + B and with the values we just found plugged in it becomes $\frac{1}{2}$ (10)(3) + (6.25).

And now all we have to do is solve!
$\frac{1}{2}$ (10)(3) + (6.25)
$\frac{1}{2}$ (30) + (6.25).
15 + (6.25).
21.25

And there you have it! The surface area of a pyramid with base sides of 2.5 inches and a slant height of 3 inches is 21.25 inches.

Hope you find this helpful!

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3 years ago

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NemiM [27]

Answer: 5

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3 years ago

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Sam runs a lemonade stand. One day he collected $6.55 in nickels and dimes. The number of nickels was 6 more than half the numbe

vampirchik [111]

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