Answer:
19
Step-by-step explanation:
y=2×8+3
=16+3=19
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Answer:
i need help to
Step-by-step explanation:
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Answer:
(-1, 4)
Step-by-step explanation:
We are told that:
y = -2x + 2 and
y = 7x + 11.
We can eliminate "y" by setting these two equations = to each other:
-2x + 2 = 7x + 11.
We need to solve this equation for x.
Adding 2x to both sides, we get 2 = 9x + 11.
Subtracting 11 from both sides results in -9 = 9x. Thus, x = -1.
Find y by subbing -1 for x in either of the given equations.
If we use the 2nd equation, then y = 7(-1) + 11, or y = 11-7, or y = 4.
The solution of this system of linear equations is (-1, 4)
Answer:
x =4.5 hours
Step-by-step explanation:
We can use ratios to solve
150 miles 270 miles
--------------- = --------------
2.5 hours x miles
150 *x = 270*2.5
Divide each side by 150
150x/150 = 270*2.5/150
x =4.5 hours