Answer:
20 minutes on the stationary bike
10 minutes on the treadmill
Step-by-step explanation:
x = minutes on bike
y = minutes on treadmill
x + y = 30
12x + 15y = 390
x = 30-y
12(30-y) + 15y = 390
360 - 12y + 15y = 390
3y = 30
y = 10
x + 10 = 30
x = 20
Answer:
ii.
Step-by-step explanation:
Answer:
730 g of olives
Step-by-step explanation:
First, convert 1 kg of olives to 1,000 g of olives.
Since he uses 30 grams per loaf, and makes 9 loaves, multiply 30x9, which equals 270g. This means he used 270 g of olives.
To find how many he has left, you subtract the amount he used from the amount he started with:
1,000 - 270 = 730 g
<span>√x^2+2x-10=√x+20
raising both members to the square
</span> x^2+2x-10=x+20
rewriting
x^2+x-30=0
factoring
(x+6)(x-5)=0
therefore the solutions are
<span> x = –6, x = 5
</span>the answer is
<span>B. x = –6, x = 5</span>
Average = 77=(77+80+63+61+92+Next test)/6
Therefore, 77*6=77+80+63+61+92+Next test
Next test score = (77*6)- (77+80+63+61+92)= 89
