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nasty-shy [4]
3 years ago
9

Sandi is 13 years old. Karla is 3 times Sandi's age. How old is Karla?

Mathematics
1 answer:
RoseWind [281]3 years ago
7 0
39. 13x3.....................

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What is the unit rate for 875.52 kilometers in 38.4 hours? Enter your answer, as a decimal, in the box.
serious [3.7K]
We are given:
number of kilometers = 875.52 km
time = 38.4 hours

We need to calculate the unit rate, which means that we need to find the number of kilometers in one hour.
To do so, we will simply divide the total number of kilometers by the total time as follows:
unit rate = 875.52 / 38.4 = 22.8 km/hour
8 0
3 years ago
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The total surface area of a cone whose radius is 2 r and slant height 2l is
vampirchik [111]

Answer:

A=4\pi r(l+r)

Step-by-step explanation:

The total surface area of a cone is given by :

A=\pi rl+\pi r^2\\\\=\pi r(l+r)

Put r = 2r and l = 2l in the above formula

A=\pi \times 2r(2l+2r)\\\\A=2\pi r(2l+2r)\\\\=2\pi r \times 2(l+r)\\\\=4\pi r(l+r)

Hence, the total surface area of the cone is 4\pi r(l+r).

7 0
2 years ago
Solve: –3x – 24 ≤ –36 what is x equal to?
Kay [80]

Answer:

X <= 4

Step-by-step explanation:

-3x - 24<= -36

Make -3x the subject, by carrying -24 to the other side

Note: Moving -24 to the other side changes to + 24

-3x <= -36 + 24

-3x <= - 12

Minus cancels minus

3x <= 12

Divide both sides by 3,to get the value of x

3x/3 <= 12/3

x <= 12/3

x <= 4

Therefore, x equals to 4

6 0
3 years ago
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Which number line represents the solution set for the inequality 3(8-4x)&lt;6(x-5)?
djverab [1.8K]

we have

3(8-4x) 54\\ x > (54/18)\\x > 3

the solution is the interval -------> (3,∞)

therefore

the answer in the attached figure

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3 years ago
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In the diagram of JML below, NK∥ML, JN=6, NM=30, and JK=7. What is the length of JL?
SpyIntel [72]

Answer:

NK

Step-by-step explanation:

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2 years ago
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