Answer:
36
Step-by-step explanation:
We can use combinations
9 choose 2 =
9!/(7!*2!) = (9*8)/2 = 36
Answer:
x=2
Step-by-step explanation:
y=-7x+13
y=-1
plug in -1 for y in the first problem.
-1=-7x+13
subtract 13 by both sides
-14=-7x
divide both sides by -7 to isolate x
2=x
hope that helped have a good day
Answer:
Yes, PQR ~ TSV with a scale of 1 : 
Step-by-step explanation:
Yes the triangles are congruent for the statement given in option C
The scale 1 : shows that the side lengths are proportional
PQ/TS = QR/SV
3/6/ and that's simplified as 1/
Answer:x=53/6 and y=-55/6
Step-by-step explanation:
Let the first number x
Second number b y
Sum of the numbers x+y=-1/3
x-y=18
Solve simultaneously
Using elimination method
We get
2y=-55/3
y=-55/6
Substitute for y in equation 1
x+55/6=18
x=18-55/6
x=53/6
Answer: 5x2-2x-7
Step-by-step explanation:
(4x2 + 3x - 1) + (x2 - 5x - 6)
=4x2+3x-1+x2-5x-6
=5x2-2x-7
