Answer:
13 quarters must be tails.
Step-by-step explanation:
Number of quarters = 40% of 50 coins
Number of quarters = 40/100 * 50 = 20 coins which are quarters.
35% of these 20 quarters on heads. We can proceed in 2 ways from here.
We can actually find the number of quarters that are on heads.
35/100 * 20 = 7 quarters are showing heads.
Since the other quarters must be tails 20 - 7 = 13 quarters must be tails.
The other way to do it is to realize that if 35% of the coins are heads, 65% of the coins must be tails 20 * 65/100 = 13 which is a bit more direct.
Answer:
j = 3 + p
or
j = p + 3
Step-by-step explanation:
Alvin = p
John = j
John is 3 years older, so this is + 3.
j = 3 + p
Answer:
-X=9
Step-by-step explanation:
f(x)=-x-1
Plug in -10
-10=-x-1
add 1 to -10
-9=-x
which means -x=-9
to check, plug everything in
-10=-9-1
-10=-10
Answer: $14.75
I just did $0.75 x 7 = $5.25 and subtracted that from $20. Lmk if this helps or if my answer was incorrect!
Answer:
20% increase in expenses
Step-by-step explanation:
Since 120 is bigger than 100, the money spent will increase.
120 / 100 = 1.20
That is 20%.
