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2 years ago

ITS AN EMERGENCY PLEASE HELP

Mathematics

1 answer:

Vlada [557]2 years ago

7 0

Answer:

$9.80

Step-by-step explanation:

Remember that the way to find the mean of a data set is by adding together all the values, and dividing by the number of the values. So, in this case, you add the 5 values together and get 49. Since there are 5 values, you divide 49 by 5 and get 9.8, or in a real world-money situation $9.80.

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The flagpole at school casts a shadow that is 18 feet long. A student nearby is 5.5 feet tall and casts a shadow that is 3 feet

azamat

Answer:

33 feet.

Step-by-step explanation:

If the ratio of the student to their shadow and flagpole to its shadow are equal, then you can use the proportion

5.5/3 = x/18 and cross multiply to find x.

5.5 × 18 = 99

3 × x = 3x

3x/3 = x, 99/3 = 33.

x = 33.

5 0

3 years ago

What is x/5 + 3 = 10 solve for x

weqwewe [10]

Answer: x=35

Step-by-step explanation: hi! i’m happy to help. subtract the three from both sides, multiply the entire problem by 5 to even out the x, and there’s your answer :)

6 0

3 years ago

Read 2 more answers

Solve for the equation for x: 4.5x-2.3=6.7

dusya [7]

Step-by-step explanation:

4.5x-2.3=6.7 (add 2.3 so no number in the equation)

6.7+2.3 is 9

4.5x=9 (divide by 4.5 as it's 9 is divisible by 4.5

9/4.5 is 2

X=2

put it back into the equation

4.5*2 is 9

9-2.3 is 6.7

Therefore X=2

3 0

3 years ago

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Jamaal spent x minutes today practicing his guitar and y minutes today on homework. If the total time he spent on both is 45 min

Arte-miy333 [17]

<span>In the question "Jamaal spent x minutes today practicing his guitar and y minutes today on homework. If the total time he spent on both is 45 minutes or more, which inequality best represents his practice time?" Since the total time he spent on both is 45 minutes or more, it means that the sum of x and y is greater than or equal to 45. Therefore, the required equation is x + y ≥ 45.</span>

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2 years ago

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The area of the base (B) of a triangular pyramid is 28 cm. The perimeter (p) is 20 cm, and the slant height (S) is 5 cm. Determi

kenny6666 [7]

Answer:

The pyramid's surface area is 78 square centimeters

Step-by-step explanation:

The formula of the surface area of a pyramid is S.A = A + $\frac{1}{2}$ p s, where

A is the area of its base
p is the perimeter of its base
s is the slant height of it

∵ The area of the base of a triangular pyramid is 28 cm²

∴ A = 28 cm²

∵ The perimeter of the base is 20 cm

∴ p = 20 cm

∵ The he slant height is 5 cm

∴ s = 5 cm

- Substitute these values in the formula of the surface area

above to find it

∵ S.A = 28 + $\frac{1}{2}$ (20)(5)

∴ S.A = 28 + 50

∴ S.A = 78 cm²

The pyramid's surface area is 78 square centimeters

5 0

3 years ago