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Kaylis [27]
2 years ago
7

PLS HELP Solve for n. -3 + n = 8

Mathematics
2 answers:
pentagon [3]2 years ago
8 0
-3 + n = 8
+3 +3

n = 8 + 3
n = 11
Tamiku [17]2 years ago
6 0

Answer:

-3 + 11 = 8

Step-by-step explanation:

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What is 15/21 subtracted by 5/7 equal ?
Artemon [7]

Answer:

0

Step-by-step explanation:

<u>Step 1:  Make common denominators</u>

What is the LCM of 21 and 7:  7

So, we need to convert both fractions into a 21 denominator.

<em>15/21 * 1/1 = 15/21</em>

<em>5/7 * 3/3 = 15/21</em>

<em />

<u>Step 2:  Subtract the numbers</u>

15/21 - 5/7 is same as 15/21 - 15/21

15/21 - 15/21

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3 0
3 years ago
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Nancy has a big chocolate bar shaped like a rectangular prism. It is 15 centimeters long, 14 centimeters wide, and 2 centimeters
Leya [2.2K]

Answer: 420 cm^{3}

Step-by-step explanation:

The volume V of a rectangular prism is given by:

V=(length)(width)(thickness)

If the chocolate bar has the following dimensions:

length=15 cm

width=14 cm

thickness=2 cm

Its volume is:

V=(15 cm)(14 cm)(2 cm)

V=420 cm^{3}

4 0
3 years ago
To estimate the height of a house Katie stood a certain distance from the house and determined that the angle of elevation to th
Nata [24]

the height of the house is 408ft .

<u>Step-by-step explanation:</u>

Here we have , To estimate the height of a house Katie stood a certain distance from the house and determined that the angle of elevation to the top of the house was 32 degrees. Katie then moved 200 feet closer to the house along a level street and determined the angle of elevation was 42 degrees. We need to find  What is the height of the house . Let's find out:

Let  y is the unknown height of the house, and x is the unknown number of feet she is standing from the house.

Distance of house from point A( initial point ) = x ft

Distance of house from point B( when she traveled 200 ft towards street  = x-200 ft

Now , According to question these scenarios are of right angle triangle as

At point A

⇒ Tan32 =\frac{Perpendicular}{Base}= \frac{y}{x}

⇒ Tan32 = \frac{y}{x}

⇒ y=x(Tan32 )       ..................(1)

Also , At point B

⇒ Tan42 = \frac{y}{x-200}

⇒ y=(x-200)(Tan42)     ..............(2)

Equating both equations:

⇒ (x-200)(Tan42) = x(Tan32)

⇒ x(Tan42-Tan32)=Tan42(200)

⇒ x=\frac{Tan42(200)}{(Tan42-Tan32)}

⇒ x=653ft

Putting  x=653ft in  y=x(Tan32 )  we get:

⇒  y=x(Tan32 )    

⇒  y=653(Tan32 )

⇒  y=408ft

Therefore , the height of the house is 408ft .

4 0
3 years ago
I NEED HELP ASAP PLEASE GIVING BRAINLIEST!!
Salsk061 [2.6K]

Answer:

35 more video games

Step-by-step explanation:

40 times 3 and then substract 85

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7 0
3 years ago
Seven more than the product of 7 and a number
n200080 [17]
Answer:

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Explanation:

Seven more (7 plus) the product of 7 and a number (seven times n) = 7 plus 7n
8 0
2 years ago
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