-2x+5y=-15 5x+2y=-6 how many solutions does this system have
2 answers:
Answer:
Step-by-step explanation:
-2x + 5y = -15
5x + 2y = -6
-10x + 25y = -75
10x + 10y = -30
35y = -105
y = -3
5x + 2(-3) = -6
5x - 6 = -6
5x = 0
x = 0
(0, -3)
one solution
Answer:
one solution
Step-by-step explanation:
took the test
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(70+71+72+x)/4 ≥ 73
(213+x)/4 ≥ 73
213+x ≥ 73*4
213+x ≥ 292
-213 -213
x ≥79
Check:
(70+71+72+80)/4
292/4
73.25
Your Answer:
x ≥ 79
Equation
example
n= 6(5)
n=30
he needs to read 30 books in 5 months
Answer:
Step-by-step explanation:
a triangle = 180
Q = 180 - (90 + 45)
Q = 180 - 135
Q = 45
Answer:
Step-by-step explanation:
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