Answer:
x=8a
Step-by-step explanation:
(3/a) x - 4 = 20
add 4 to both sides
(3/a) x = 24
Divide by 3/a
x = 24 / (3/a)
Use KCF (keep change flip)
x = (24/1) x (a/3)
x = 24a / 3
simplify
x = 8a
Answer:
i dont understand
Step-by-step explanation:
Answer:
<em>x</em> = 3
<em>y</em> = -7
Step-by-step explanation:
<em>y</em> = -4<em>x </em>+ 5
<em>y </em>= 3<em>x </em>- 16
<u>Substitute </u><u><em>y</em></u><u> in the first equation with 3</u><u><em>x</em></u><u> - 16</u>
3<em>x</em> - 16 = -4<em>x </em>+ 5
+4<em>x </em>+4<em>x</em>
7<em>x</em> - 16 = 5
+16 +16
7<em>x</em> = 21
÷7 ÷7
<em>x</em> = 3
<u>Then, put </u><u><em>x</em></u><u> = 3 in </u><u><em>y</em></u><u> = -4</u><u><em>x</em></u><u> + 5</u>
<em>y</em> = -4(3) + 5
<em>y</em> = -12 + 5
<em>y</em> = -7
2 1/12. It took her 2 hours and 5 minutes or 2 1/12.
Answer:
y = -5x + 800 where x is the time in seconds and y the height of the parachutist in feet.