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Naddika [18.5K]
2 years ago
7

20 points and a brainliest! And PLEASE show your work.

Mathematics
1 answer:
Mars2501 [29]2 years ago
7 0

Answer:

Volume = 128

Surface area = 179.2

Step-by-step explanation:

The figure appears to be a square pyramid

The volume of a pyramid can be calculated using the formula : a²(h/3)

where a = base length and h = height

Here the base length appears to be 8 and the height appears to be 6

So we have V = a²(h/3) and a = 8 and h = 6

==> plug in values

V = 8²(6/3)

==> evaluate exponent

V = 64(6/3)

==> divide 6 by 3

V = 64(2)

==> multiply 64 and 2

V = 128

Formula for surface area of a square pyramid is SA = a² + 2al

where a = base length and l = slant height

Looking at the pyramid the slant height appears to be 7.2 and the base length is 8

so we have SA = a² + 2al and a = 8 and l = 7.2

==> plug in values

SA = 8² + 2(8)(7.2)

==> evaluate exponent

SA = 64 + 2(8)(7.2)

==> multiply 2, 8 and 7.2

SA = 64 + 115.2

==> add 64 and 115.2

SA = 179.2

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A dial combination lock has dials numbered 0 to 5. The lock is set to an even number. How many different numbers could it be?
Butoxors [25]

The number of combinations will be 6 for even numbers.

<h3>What is the combination?</h3>

The arrangement of the different things or numbers in a number of ways is called the combination.

Given that:-

  • A dial combination lock has dials numbered 0 to 5. The lock is set to an even number. How many different numbers could it be?

The total sample numbers are from 0 to 5 which are 0,1,2,3,4,5.

The even numbers are 0,2,4.

The combinations will be given by:-

C = 3!

C = 3 x 2 x1

C = 6

Therefore the number of combinations will be 6 for even numbers.

To know more about Combinations follow

brainly.com/question/295961

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3 0
2 years ago
A motorboat takes 5 hours to travel 200 miles going upstream. The return trip takes 4 hours going downstream. What is the rate o
dsp73

Answer:

rate of motorboat: b

rate of current: c

So the rate the boat travels upstream is $b - c$, and the rate it travels downstream is $b + c$

Step-by-step explanation:

d = rt

200 = (b - c)\cdot 5

200 = (b + c)\cdot 4

b - c = 40

b + c = 50

Adding these equations, we get:

2b = 90

b = 45

So

c = 50 - 45 = 5

<u>Therefore the rate of the boat is 45kph, and the rate of the current is 5kph</u>

Hope this helps :)

4 0
3 years ago
The matrix is used to solve a problem. Which of the following would be a solution to the problem?
timurjin [86]
The answer would be c because I know
3 0
3 years ago
Two boys decided to buy a computer. The second boy had 5 6 of the money the first had. The first boy had 7 8 of the price of the
sdas [7]

Answer: The price for the computer = $1152

Step-by-step explanation:

Let the first boy = F

Let the second boy = S

Let the price of computer = C

The second boy had 5/ 6 of the money the first had. I.e

S = 5/6 F

Then F = 6/5S ......(1)

The first boy had 7 /8 of the price of the computer. That is

F = 7/8C ....... (2)

Substitute F in (1) into (2)

6/5S = 7/8C

S = 5/6 × 7/8C

S = 35/48C ......(3)

Together they had $696.00 more than they need to pay. That is

F + S = C + 696 ........ (4)

Substitute equation 2 and 3 into 4

7/8C + 35/48C = C + 696

0.875C + 0.729C = C + 696

0.604C = 696

C = 696/0.604

C = 1152 dollars

Therefore, the price for the computer = $1152

7 0
3 years ago
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A) 2(x + 10)<br><br> What’s the answer
ss7ja [257]
<h2>Answer: 2x + 20</h2>

indeed

3 0
3 years ago
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