Answer:
x = 2 and x = 4
Step-by-step explanation:
The solutions are the points of intersection. Those points as marked on the graph give both the x-value (2 or 4) and the associated function value (2 or -22).
The solution to the equation f(x) = g(x) doesn't care what the function value is (except that the two function values are equal). The solution is the x-value that makes those function values equal.
Answer:
12,000psi
Step-by-step explanation:
Given the 7 days strength of a concrete to be 3000psi, to calculate the estimated mean28-day strength of this concrete the following equality equation is applied
7 days strength = 3000psi
28days strength = y
To get y, we will Cross multiply
7 × y = 28×3000
7y = 28×3000
7y = 84000
Divide both sides by 7
7y/7 = 84000/7
y = 12000
hence the estimated mean 28-day strength of this concrete is 12,000psi
Answer:
700$ at 2% 800$ at 4%
Step-by-step explanation:
x+y=1500 This is because the total is 1500 dollars into 2 different accounts, x and y.
0.02x+0.04y=44 This is because it says 2 percent interest in one account and 4 percent in the other, and the totals add up to 44 dollars.
Now use elimination method.
x+y=1500(-0.02)=-0.02x+-0.02y=-30
0.02x+0.04y=44
Now you end up with 0.02y=14, solve for y and you get 700. That's the value of y which now you can then subtract from 1500 and get 800 which is the value of x.
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