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IgorLugansk [536]
3 years ago
14

Help ASAP please need answer

Mathematics
1 answer:
Darya [45]3 years ago
4 0

Answer:

x = 11

Step-by-step explanation:

68 + 2x = 90

-68          -68

        2x = 22

         /2     /2

          x = 11

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Solve for x. Round your answer to the nearest tenth if necessary.
diamong [38]

Answer:

x ≈ 17.5

Step-by-step explanation:

using Pythagoras' identity in the right triangle.

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is

x² = 9² + 15² = 81 + 225 = 306 ( take square root of both sides )

x = \sqrt{306} ≈ 17.5 ( to the nearest tenth )

6 0
2 years ago
Read 2 more answers
~ HELP NEEDED!!!! 20 POINTS ~
sladkih [1.3K]

Answer:

Here is a proof

 

Angle DEF  =  angle ABC              

A transversal cutting two parallel lines makes alternate exterior angles equal

 

Sum of  measures of angles 1 and 2  = 50° + 48°  =  98°   = measure of angle DEF  =  measure of angle ABC

 

But since  s bisects   angle ABC, then angle 4  =  98 / 2   = 49°

 

But angles 3 and 4  are vertical angles....therefore.... measure of angle 3  =  49°

Step-by-step explanation:

6 0
4 years ago
Find the percent increase in volume when 1 foot is added to each dimension of the prism. Round your answer to the nearest tenth
deff fn [24]

Answer:

About 51.5%

Step-by-step explanation:

The volume of the prism currently is (9*4)/2*11=18*11=198 cubic feet. If you added a foot to each dimension, the volume would be 10*5/2*12=25*12=300. (300-198)/198=102/198 a percent increase of about 51.5%. Hope this helps!

7 0
3 years ago
Mr. Drew wants to build a square sandbox for his children. The area of the sandbox will be 70 ft squared . To the nearest​ tenth
ziro4ka [17]

Answer:

Mr. Drew needs 167.3 ft of wood

Step-by-step explanation:

we know that

The area of a square is

A=b^{2}

where

b is the length side of the square

we have

A=70\ ft^2

substitute in the formula and solve for b

70=b^{2}

square root both sides

b=\sqrt{70}\ ft

To determine the total length of wood , calculate the perimeter of the sandbox

The perimeter of the sandbox is equal to the perimeter of 5 squares

so

P=5(4b)

substitute the value of b

P=5(4(\sqrt{70}))=167.3\ ft

therefore

Mr. Drew needs 167.3 ft of wood

7 0
3 years ago
25.5 is what percent of 60
OLEGan [10]
%/100 = is/of 
25.5%/100= x/60
The answer is 15.3

6 0
4 years ago
Read 2 more answers
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