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4 years ago

Please help with surface area

Mathematics

2 answers:

Lyrx [107]4 years ago

8 0

Answer:

First you have to find the area of the triangles, and you do so by using the formula A = (B·H)/2, where the a represents area, b represents base, and h represents height. Assuming all of the triangles are the same, you multiply 7 by 11 and then divide by 2 which equals 38.5 and then multiply that by 4 which equals 154 and then you have the area of all four triangles combined. Then to find the area of the cube you simply square 7, which results in 49, and then add that to the area of the triangles, which leaves you at 203. <u>203 square inches is your answer. </u>

Step-by-step explanation:

mestny [16]4 years ago

6 0

Answer:

203 square inches.

Step-by-step explanation:

First you have to find the area of the triangles, and you do so by using the formula A = (B·H)/2, where the a represents area, b represents base, and h represents height. Assuming all of the triangles are the same, you multiply 7 by 11 and then divide by 2 (which equals 38.5) and then multiply that by 4 (which equals 154) and then you have the area of all four triangles combined. Then to find the area of the cube you simply square 7, which results in 49, and then add that to the area of the triangles, which leaves you at 203. 203 square inches is your answer.

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Is this right? Question isn’t below!

Angelina_Jolie [31]

Answer:

yes

Step-by-step explanation:

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8 0

4 years ago

Read 2 more answers

The perimeter of the scalene triangle is 60 cm. The length of the longest side is 4 times that of the shortest side. Which state

NNADVOKAT [17]

Answer:

We know that in a scalene triangle all sides (and angles) are different.

Let

z = length of longest side

y = length of second side

x = length of shortest side

The perimeter of the scalene triangle is 60 cm

x + y + z = 60 cm

The length of the longest side is 4 times that of the shortest side.

z = 4*x

We are left with the following equations

x + y + z = 60

z = 4*x

We will test every affirmation

Number one

The value of x can equal 40.

FALSE. The longest side cannot be greater than the perimeter.

Number two

The longest side can equal 30 cm

z = 30 cm

x = 30/4 cm = 7.5 cm

y = [60 -30 - 7.5] cm = 22.5 cm

This statement is TRUE

Number three

The shortest side can equal 7 cm

x = 7 cm

z = 4*7 cm = 28 cm

y = [60 -28 - 7] cm = 25 cm

This statement is TRUE

Number four

The value of x can equal 25

x = 25 cm

z = 4*25 cm = 100 cm

The longest side cannot be greater than the perimeter.

This statement is FALSE

Number five

The shortest side can equal 5

x = 5 cm

z = 4*5 cm = 20 cm

y = [60 -20 - 5] cm = 35 cm

This statement is FALSE. The second side (y) cannot be greater than the longest side (z).

5 0

3 years ago

Your mother gave you $13.32 with which to buy a present. This covered 3/5 of the cost. How much did the present cost

Gala2k [10]

Answer:

$22.20

Step-by-step explanation:

We are told that $13.32 only covered 3/5 of the cost. Does this mean it covered the whole cost? No. The 5 in the denominator represents the whole cost, and the 3 represents the fraction of the cost. In this case, 13.32 represents the 3, as it did not cover the whole cost.

Let's set up our equation by making 13.32 into a fraction.

13.32/x

We will represent the present's actual cost with the letter x.

13.32/x = 3/5

We want to make sure the 13.32 is in the numerator, equal to the 3 in the numerator in the 3/5 number, because we know that $13.32 only covered for a <em>fraction </em>of the present's cost, not the whole cost.

We solve this by doing cross multiplication. Multiply the 13.32 by the 5.

13.32 x 5 = 66.6

Next we divide 66.6 by 3 to get 22.2

66.6/3 = 22.2

This gives us our final answer of $22.20. This means that the cost of the original present was $22.20

5 0

4 years ago

Help me plz due today

Nostrana [21]

49.10 = 5 + 2.10 * x

x = 21

5 0

3 years ago

The area of a square piece of cardboard is 81 square inches. What is the length of the cardboard?

Marianna [84]

Answer:

Step-by-step explanation:

The area of a square is found in the formula

$A=s^2$

We have the Area value so we will plug it in:

$81=s^2$

Take the square root of both sides to undo the square on the s to get that

s = 9

8 0

4 years ago