Answer:
C
Step-by-step explanation:
∠1 = 3x + 18 {Vertically opposite angles}
∠1 + 28° = 90
3x + 18 + 28 = 90
3x + 46 = 90
3x = 90 - 46
3x = 44
x = 44/3
The required number is 19 given that -2 is added to a number, the sum is doubled and the result is -15 less than the number. This can be obtained by assuming the number as x, converting the given conditions to algebraic expression, forming algebraic equation and solving for x.
<h3>Find the required number:</h3>
Here in the question it is given that,
- The result is -15 less than the number
We have to find the required number.
Let the required number be x.
⇒ -2 is added to the number ⇒ -2 + x
⇒ the sum is doubled ⇒ 2(-2 + x)
⇒ the result is -15 less than the number ⇒ 2(-2 + x) = x -(-15)
2(-2 + x) = x + 15
⇒ - 4 + 2x = x + 15
⇒ x = 19
Hence the required number is 19 given that -2 is added to a number, the sum is doubled and the result is -15 less than the number.
Learn more about algebraic expression and equation here:
brainly.com/question/953809
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Answer:
p(x)=(x-2)^2(x+5)
Step-by-step explanation:
p(2)=0 then p(x) =(x-2)^2(x-x1), x1=?
p(1)=6
p(3)=8
p(1)=(1-2)^2(1-x1)
6= (-1)^2 (1-x1)
6=1(1-x1)
6=1-x1
x1=-5;
then p(x) =(x-2)^2(x-(-5))=(x-2)^2(x+5)
Really: f(3)=(3-2)^2(3+5)=1*8=8
I have no idea but good luck
