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olya-2409 [2.1K]
3 years ago
14

Whats the answer to a − 4 = 8 + a

Mathematics
2 answers:
marusya05 [52]3 years ago
5 0

Answer:

Step-by-step explanation:12

Svetllana [295]3 years ago
5 0
The answer is either 0=12 or -12=0
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Find the slope of the line perpendicular to AB. A(3, 5) and B(3, -8).
SashulF [63]

Answer:

m = 0

Step-by-step explanation:

AB has a slope of y2 - y1 / x2 - x1 so -8-5/3-3 so -13/0 = undefined so it is a vertical line, so any line that is horizontal will be perpendicular to it, so horizontal lines have a zero slope

3 0
2 years ago
For an acute angle θ, the equation sin (θ) = cos (7°)is true. What is the value of θ?
8_murik_8 [283]

Answer:

  θ = 83°

Step-by-step explanation:

For acute angles, the sine of an angle is the cosine of its complement, and vice versa.

__

  sin(θ) = cos(90° -θ) . . . . relation between sine and cosine

  sin(θ) = cos(7°) . . . . . . . . given

  90° -θ = 7° . . . . . . . . . matching arguments of cos( )

  θ = 83° . . . . . . . . . add θ -7° to both sides

5 0
2 years ago
Use operations of decimal, fraction, and percent numbers to model the following scenarios. In your final answer, include only an
Helen [10]
$34*.15= 5.1 off
34-5.1= $28.99
It doesn't leave % to tip so no tip included. It also didn't leave % to tax.
5 0
2 years ago
What value should be added to the expression to create a perfect square? x^2 - 20x
boyakko [2]
To complete the square:
we take the coefficient ox "x" (which in this problem is -20)
we divide it by 2
square that number
then add it to both sides of the equation

-20 / 2 = -10
-10^2 = 100
then we add 100 to both sides of the equation:
x^2 -20x
x^2 -20x +100 = 100
******************************************************
To get the roots of the equation, we take the square root of both sides:
(x -10) * (x-10) = 10
(x-10) = square root (10)
x-10 = <span> <span> <span> 3.1622776602 </span> </span> </span>
x1 = <span> <span> <span> 13.1622776602 </span>
and don't forget that square root of 10 also equals  </span></span><span><span><span> -3.1622776602 </span> </span> </span>
x2 = 10 -<span> <span> <span> 3.1622776602
x2 = </span></span></span> <span> <span> <span> 6.8377223398 </span> </span> </span>


4 0
3 years ago
A school purchased T-shirts to sell for a fundraiser. The school spent $684 for the T-shirts. Each T-shirt will sell for $12.
Setler79 [48]

Answer:

If the question is How many T-Shirts does the school have, it will be 57 T-Shirts

Step-by-step explanation:

684 divided by 12 is 57

8 0
2 years ago
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