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3 years ago

Solve for x. 7 - (2x + 11) + 3(3 - x) = 20 7/5 -3 -4

Mathematics

1 answer:

mr Goodwill [35]3 years ago

6 0

Answer:

x = -3

Step-by-step explanation:

You will have to distribute first

7 -2x -11 + 9 -3x = 20

Then, combine you like terms

-2x -3x = -5x

7 -11 +9 =5

Then you write it as an equation

-5x +5 = 20

Next you will want to have x by itself which means you have to get rid of the 5 by substracting 5 on each side (opposite of addition is substraction)

-5x = 15

Then you divide each side by -5 ( opposite of multiplication is division)

x= -3

Hope this helped :D

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3 years ago

You need to buy a 20-foot length of 15-wide carpet that costs $29.50 per square yard. How much will this cost?

Marianna [84]

The cost of the carpet will be $983.33

<h3>Calculating cost</h3>

From the question, we are to calculate how much the carpet will cost

From the given information,

The carpet has a length of 20 feet

and a width of 15 feet

First, we will covert the dimension to yard

NOTE: 1 foot = 1/3 yards

Thus,

20 feet = 20/3 yards

and

15 feet = 15/5 yards = 5 yards

Now, we will calculate the area of the carpet

Using the formula,

Area = Length × Width

Area of the carpet = 20/3 × 5 square yard

Area of the carpet = 33.33 square yard

Now, we have that

The carpet costs $29.50 per square yard

∴ The cost of the carpet = 20/3 × 5 × $29.50

The cost of the carpet = $ 983.33

Hence, the cost of the carpet will be $983.33

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2 years ago

Water boils at sea level at 100°C. The boiling point of water decreases about 5°C for every mile above sea level. Santa Fe, New

KIM [24]

First lets convert feet to miles: if 1 mi = 5280 feet then 7200 feet / 5280 feet = 1.364 miles. Now we need to see how much degrees does the boiling point for water decreases: if 1 mile = 5 degrees Celsius, then 0.364 miles correspond to 0.364*5=1.82 degrees Celsius. So now we add the two values: 5+1.82 = 6.82 degrees Celsius. Now we find the decrease in the boiling point of water: 100-6.82 = 93.18 degrees Celsius. So at 7200 feet above sea level, in Santa Fe, the water boils at 93.18 degrees Celsius.

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3 years ago

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Snowcat [4.5K]

Hi!

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Area of a triangle = $(base * height)/2$