7). C
8). 60
n = 5(10) + 10
n = 50 + 10
n = 60
9). 17
f(x) = -2x + 7 plug the -5 in for x
f(x) = -2(-5) + 7
= 10 + 7
= 17
10).
2x+3y=22
3x+4y=31
8x+12y=88
-9x-12y=-93
x=5
y=4
5 and 4.
(7a-b+3)-(-2a-8b+8)
Apply plus/minus rule.
-(-a)= a and -(a)=-a
we get
(7a-b+3)-(-2a-8b+8)= 7a-b+3+2a+8b-8
Add like terms
=9a+7b-5
Answer: 9a + 7b - 5
Step-by-step explanation:
Given that,
A 6 ounce package costs $2.16
A 15 ounce package costs $5.92
A 20 ounce package costs $7.60
So,
Cost of 1 ounce of package = 2.16/6 = $0.36
Cost of 1 ounce of package = 5.92/15 = $0.394
Cost of 1 ounce of package = 7.6/20 = $0.38
Hence, 'a 6 ounce package costs $2.16' is the best deal to buy.
Answer:
3 days
Step-by-step explanation:
First, let's convert 400 meters to km (kilometers):
To find km from m we divide the meters by 1000:
400/1000 = 0.4
Therefore, there are 0.4 km in 1 meter.
Kali runs 10 laps every day, since 1 lap is 0.4 km we can multiply 10 by 0.4 to see how many kilometers they run in 1 day:
(10)(0.4) = 4
Kali runs 4 kilometers every day
Now, we can find how long it will take Kali to run a total of 12 kilometers by dividing 12 by 4
12/4 = 3
It will take Kali 3 days to run a total of 12 kilometers.
<em>I hope this helps!!</em>
<em>- Kay :)</em>
