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Mekhanik [1.2K]
3 years ago
5

Can someone help me solve these three problems please??

Mathematics
1 answer:
Tasya [4]3 years ago
4 0
I'll solve 21, and you then should be able to solve the rest on your own!

Since ADC is 135, that means that that whole angle is 135 degrees. In addition, since angles ADB and BDC add up to ADC, we get ADB+BDC=ADC=135=11x+9+7x=18x+9. Subtracting 9 from both sides, we get 126=18x. Dividing both sides by 18, we get x=7. Plugging that into 11x+9=BDC, we get 11*7+9=77+9=86
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Evaluate the expression. 12 +( 8 x ( 4 + 3) + 2) - 6​
kondaur [170]

Answer:

56x + 8

Step-by-step explanation:

8 0
2 years ago
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What is an equation of the line that passes through the point (- 5, - 6) and is parallel to the line 4x - 5y = 35
Elena L [17]

Answer:

4x - 5y = 10

Step-by-step explanation:

Any line parallel to 4x - 5y = 35 will have the same equation EXCEPT that the constant will be different.

Starting with 4x - 5y = 35, replace x with the given x-coordinate -5 and the given y-coordinate -6, and finally the given 35 with the constant C:

4(-5) - 5(-6) = C, or

-20 + 30 = C.  Thus, C = 10, and the equation of the new line is

4x - 5y = 10

7 0
3 years ago
Help plz i’ll give extra points
swat32

elevation in feet = 8.56(140) + 674

elevation in feet = 1872.4

Round to the nearest whole number: 1872

Answer: 1872

4 0
3 years ago
Solve the quadractic formula 3x+x-3=0
Mumz [18]

Answer: x = 0.75

Step-by-step explanation:

3x+x - 3 =0

4x - 3=0

4x = 3

x = 0.75

7 0
2 years ago
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Please I really need it ASAP!I'll give you brainliest! please...!!!!
nignag [31]

Answer:

5x+2 = 2x+17

=> 5x-2x = 17-2

=> 3x = 15

=> x = 15/3

=> x = 5

thats my answere

brainlieat me!!!thankyou

#keepitup

3 0
2 years ago
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