Answer:
SQR = 60
Step-by-step explanation:
BISECTS both angles are equal
RQS = SQP
5x+10=7x-10
20=2x
10=x
-------------------
5(10)+10=50+10=60
60 + 60 =120
Both B and D are 100% correct. I'd flip a coin because there is no way of answering that one 100% correctly. <span />
2x-3y=13 Equation 1
x+2y=-4 Equation 2
Solving by substitution method.
Isolate x from equation 2.
x=-2y-4
Substitute value of x in equation 1.
2(-2y-4)-3y=13
-4y-8-3y=13
-7y-8=13
-7y=21
y=-3
Now substitute value of y in x=-2y-4
x=-2(-3)-4
x=6-4
x=2
Answer: (x,y)= (2,-3)
Answer:
Extrapolation
Step-by-step explanation:
Given
Explanatory variable
Response variable
Required
Predicting y outside range of x is called
This is referred to as extrapolation.
Take for instance, the range of x is: 1 - 9
You have extrapolated when, 10 is assumed to be the value of x and this value is entered in an equation to predict y.