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blagie [28]
3 years ago
6

Solve the equation r ÷ (-8) =5​

Mathematics
2 answers:
krok68 [10]3 years ago
8 0

Answer:

r=-40

Step-by-step explanation:

r/-8=5

times -8 on both sides

5 times -8 =-40

r=-40

lara [203]3 years ago
7 0

Answer:

r= 13,3

Step-by-step explanation:

let me know if that was wrong good luck

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Lester worked 12 hours last week at the grocery store and earned $93.00. If he continues to earn the same hourly pay, how many a
Firdavs [7]

Answer:

8 hours

Step-by-step explanation:

We can use a ratio to solve

12 hours    x hours

----------   = ------------

93 dollars    62 dollars

Using cross products

12 * 62 = 93x

Divide each side by 93

12*62/93 = 93x/93

8 = x

8 hours

7 0
2 years ago
A Petri dish contains 100 bacteria cells. The number of cells increases 5% every minute. How long will it take for the number of
alexandr402 [8]
Using logarithm, the following equation will apply:
Y = P * [1 + z]^x
Where Y = 2000
P = 100
z = 5% = 0.05
x is the quantity we are calculating for
The equation becomes
2000 = 100 * [1+ 0.05]^x
Dividing both side by 100, we have 
20 = 10 * [ 1 + 0.05]^x
Taking the log of both sides, we have
Log 20 = Log [1 + 0.05]^x
log 20 = x * log 1.05
x = log 20/ log 1.05 = 61.40
Thus, it will takes 61.40 minutes for the number of cells in the petri dish to reach 2000.

8 0
3 years ago
2,4 help me idk how to do it ASAP and show work if possible
azamat

Answer:155in^2

Step-by-step explanation:

Area of the poster board that she has left=Area of ||gm- area of ∆

Area of the poster board that she has left= 10*20-1/2*9*10

Area of the poster board that she has left=200-45=155in^2

7 0
3 years ago
A = 5/3 right angle,find b​
Dmitrij [34]

Answer: i can't

Step-by-step explanation: what b

there's no picture attached

does b have any value?

put a picture and i'll edit my answer

4 0
3 years ago
Simplify the expression using positive exponents: x^7/x^3
Nikolay [14]

Answer:

x power of 4

Step-by-step explanation:

Subtract 7 by 3

3 0
3 years ago
Read 2 more answers
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