Answer:
36
Step-by-step explanation:
The answer is easy to find if we use the cross-multiplication method.
We know 7 students out of 10 picked apples, then 3 out of 10 picked bananas.
We know the number of people who picked apples.
We just have to isolate x, this way and solve the problem:
becomes
So, 36 students picked bananas as their favorite fruit.
94 Points must be scored in order to get an average of 90 for his grade.
Answer:
Each daylilies cost $7
Step-by-step explanation:
Step one:
let roses be x
and daylilies be y
so
8x+15y=193--------------1
also
3x+12y=117--------------2
we can solve equations 1 and 2 by substitution
8x=193-15y
x=(193-15y)/8
put x= (193-15y)/8 in 3x+12y=117
3((193-15y)/8)+12y=117
(579-45y)/8+12y=117
579-45y=8(117-12y)
579-45y=936-96y
collect like terms
579-936=-96y+45y
-357=-51y
divide both sides by -51
y=-357/-51
y=7
Hence each daylilies cost $7
put y=7 in eqn 1
8x+15(7)=193
8x+105=193
8x=193-105
8x=88
x=88/8
x=11
rose cost $8
Answer: 88
Step-by-step explanation:
So we have 220:2.5, since 30 seconds is half a minute we can make that .5, so to get unit rate it’s formula is front divided by back,
220/2.5 = 88!
Step-by-step explanation:
105/3 = 35 push ups per minute
35 x 5 = 175 push ups in 5 minutes
