Answer:
78
Step-by-step explanation:
To find y, divide the first equation by 2.
y = 4
To find x, use that value for y in the second equation. Add 4, then divide by 2.
15·4 = 2x -4
60 +4 = 2x
64/2 = x = 32
The solution is (x, y) = (32, 4).
Answer:
( 2x + 1 ) (x + 1 )
Step-by-step explanation:
2x² + 7x + 3
m+n = b = <u>7</u>
m · n = a · c = 2 · 3 = <u>6</u>
m = 6
n = 1 because 6 + 1 = <u>7</u> and 6 · 1 = <u>6</u>
2x² + <u>1</u>x + <u>6</u>x + 3
x ( 2x + 1 ) + 3 ( x + 1 )
( 2x + 1 ) (x + 1 )
Answer: 83.3
Step-by-step explanation:
0.98 x 85 =83.3