Answer:
x=3,y=7
Step-by-step explanation:
8x+3y=45
2x+3y=27
8x-2x=6x
45-27=18
<u>6</u><u>x</u><u>=</u><u>1</u><u>8</u>
6. 6
x=3
2x+3y=27
2(3)+3y=27
6+3y=27
3y=27-6
<u>3</u><u>y</u> = <u>2</u><u>1</u>
3. 3
y=7
56 is 80% of 70.
70 x 0.80 = 56
To find the base number, divide 56 by 0.80:
56 / .8 = 56 / (8/10) = 56 x (10/8) = 560/8 = 70
With negative exponents you make it a fraction.
For example with your equation it would be
1/2^7<2
So basically you just flip the fraction to cancel out the negative then you can continue to solve.
Answer:
Step-by-step explanation:
120/3= is 40mph
200/40= 5
At 40 mph it will take 5 hours.
Answer:
Step-by-step explanation:
Plug in the given value of y, -2, and solve for x:
-2 + 2 = -3x + 4 and
0 = -3x + 4 and
-4 = -3x so
x = 4/3