Answer:
x = -1/4
Step-by-step explanation:
Step 1: Write out 1st equation
6x + 7
Step 2: Write out 2nd equation
2x + 6
Step 3: Set equal to each other
6x + 7 = 2x + 6
Step 4: Solve
4x + 7 = 6
4x = -1
x = -1/4
Answer:
cot(- 90)° = 0
Step-by-step explanation:
Using the identity
cot x = , then
cot(- 90)° = = = 0
Answer:
(-5,-1)
Step-by-step explanation:
2x+y=9 -> y=-2x+9
3x-y=16
3x-(-2x+9)=16
3x+2x-9=16
5x-9=16
5x-9 (+9)=16 (+9)
5x=25
x=5
no plug in 5 to x in any equation above
2(5)+y=9
10+y (-10)=9 (-10)
y=-1
so the answer is (-5,-1)
hope it's correct! and hope i helped
Answer:
8
Step-by-step explanation:
4x2=8
Answer:
A = 90, B =18
Step-by-step explanation:
From the question
The weight of meteorite A is five times the weight of meteorite B, ill get this equation
A = 5B
if their sums of their weights is 108 tons, find the weight of each, ill get this equation
A+B = 108
Now since I have two equation, u just have to solve it simultaneously
A = 5B ( equation 1)
A+ B = 108 (equation 2)
From equation 2
A+B = 108
B = 108 - A ( equation 3)
Now ill put equation 3 into equation one
A = 5B
A = 5 (108 - A)
A = 540 - 5A
6A = 540
A = 90
Now since u know A = 90, just choose any of the equations the question gave u, either equation 1 or 2, they will give u the same answers, I'll prove it to u
Equation 1
A =5B
90 = 5B
B = 90/5
= 18
Equation 2
A+B = 108
90 + B = 108
B = 108 - 90
= 18
So at the end, A = 90 ton, B = 18 ton