<em>multiply both sides by 5 </em> 3(15k+10)=5(12k-9)
<em>get rid of the brackets</em> 45k+30=60k-45
<em>take away 45k to both sides</em> 30=15k-45
<em>plus 45 to both sides</em> 75=15k
<em>divide both by 15</em> k=5
For the average to be 90,
(99 + 93 + x) / 3 = 90
or 192 + x = 270
or x = 270 - 192 = 78
Jim must score at least 78 in the third test.
Answer:
the answer is 10
Step-by-step explanation:
hope this helps
Step-by-step explanation:
3(7 + 2x) + 3 = 3(5+ x) - 9(x + 1)
21 + 6x + 3 = 15 + 3x - 9x - 9
6x + 24 = 6 - 6x
12x = -18
x = -1.5
You split the figure into 2 pieces; then what you would do is just find the surface area or volume of the 2 separate figures and add them together! Hoped this helped!
