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Kipish [7]
2 years ago
8

2(3r+7)−(2+r) I need the answer

Mathematics
2 answers:
dimaraw [331]2 years ago
8 0

Answer:

5r+12

Step-by-step explanation:

Sophie [7]2 years ago
7 0

Hey there,

<u>Answer:</u>

k(a + b) = ka + kb

2(3r + 7) - (2+ r)

= 2*3r + 2*7 - (2 + r)

= 6r + 14 - (2 + r)

= 6r + 14 - 2 - r

= 6r - r + 14 - 2

= 5r + 12

;)✅

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The distribution of heights of young women aged 18 to 24 is approximately normal with a mean of 64.5 inches and a standard devia
Lena [83]
The 68 - 95 - 99.7 rule, gives the basis to solve this question.

It says that for a normal distribution 95% of the results are between the mean minus 2 standard deviations and the mean plus 2 standard deviations.

Here:
mean = 64.5 inches,
standard deviaton = 2.5 inches

mean - 2 standard deviations = 64.5 inches - 5 inches = 59.5 inches

mean +  2 standard deviations = 64.5 inches + 5 inches = 69.5 inches

Then, the answer is that 95% of women range approximately between 59.5 inches and 69.5 inches.

6 0
3 years ago
Fred and Frank play a game. Fred picks an even number X and asks Frank to add all even numbers between 0 and X (inclusive) as fa
TiliK225 [7]

Answer:

The even numbers between 0 and X represents an arithmetic sequence with a common difference of 2

The rule of arithmetic sequence = a + d(n - 1)

Where a is the first term and n is the number of terms

So, for the even numbers between 0 and X

The first term = a = 0

d = 2

So, we need to find n at the last term which is X

∴ X = 0 + 2 ( n -1 )

∴ n - 1 = X/2

∴ n = X/2 + 1

The sum of the arithmetic sequence = (n/2) × (2a + (n−1)d)

Substitute with a and d and X

So, the sum = (n/2) * (2*0 + (n−1)*2)

                   = (n/2) * ((n−1)*2)

                   = n(n-1)

                   = (X/2 + 1) * (X/2)

                   = X/2 by (X/2 + 1)

So, The quick way to add all even numbers between 0 and X always works.

8 0
3 years ago
Solved i need the answer ASAP
makkiz [27]

Answer:

V = - 3

Step-by-step explanation:

- 1 =  \frac{1}{3} v \\  \\  - 1 \times 3 = v \\  \\ v =  - 3

Your answer is absolutely correct.

8 0
3 years ago
40.32 is 76.8% of what number
Anna71 [15]
<span>30.96576 because the calculator says so..lol

</span>
3 0
3 years ago
Read 2 more answers
Find the surface area of the rectangle prism. 3cm 9cm and 6cm
lisabon 2012 [21]

Answer:

198 cm²

Step-by-step explanation:

We are given the dimensions of a rectangular prism;

3cm 9cm and 6cm

We are required to determine its surface area;

We need to know that;

Surface area of a rectangular prism is given by;

A = 2(WL+HL+WH)

Where L, W and H are length , width and height respectively;

Assuming;

Width is 3 cm

Length is 9 cm, and

Height is 6 cm

Then;

Area = 2 ( (3×9) + (6×9) + (3×6))

        = 2(99)

       = 198 cm²

Therefore, the area of the rectangular prism is 198 cm²

6 0
3 years ago
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