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Oksanka [162]
3 years ago
15

for every 500 minutes, the number of bacteria in a petri dish decreases by 20. Which rational number shows the average change in

bacteria?
Mathematics
2 answers:
uysha [10]3 years ago
8 0
I think it would be 4-60
Yuki888 [10]3 years ago
6 0

Answer:

- 1/25 per minute

Step-by-step explanation:

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5 + 7 x 4 – (11 + 6)
satela [25.4K]

Answer:16

Step-by-step explanation:

Start with whats inside (11+6) (17) then you will multiply 7 and 4 = 28+5 =33 then back to 17,,,, 33-17=16

3 0
3 years ago
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An art gallery sells paintings at 0.35 per square inch. if a painting is 2 feet 3 inches by 3 feet 5 inches. how much would the
Natalka [10]

Hello!

ANSWER

The painting would cost $387.45.

____________________________________________________________

EXPLANATION

2' 3" = 27"

3' 5" = 41"

Multiply the length by the width (in inches) of the painting.

27 * 41 = 1107

We now know that the area of the painting is 1107in.^{2} Next, multiply the cost per square inch (0.35) by the total amount of square inches (1107).

.35 * 1107 = 387.45



7 0
3 years ago
Help please this is due soon! I need you to show the work as well <3 pic below
Dafna1 [17]

Answer:

perimeter: 4x+2 area: x^2+x

Step-by-step explanation:

for perimeter, you add x+x+x+x+1+1, which is 4x+2

for area, you multiply x*x+1, which would be x^2+x

7 0
3 years ago
Who knows the area of this ? #struggleatmath
photoshop1234 [79]
I think it’s 6. There are 4 squares and 4 triangles. 2 triangles put together turn into a square, so that would make 2 extra squares. 4+2=6.
8 0
4 years ago
3 ^(1 − 7 x = 7 ^x find the exact value
Shalnov [3]

Answer:

x

=

ln

(

3

)

7

ln

(

3

)

+

ln

(

7

)

Step-by-step explanation:

7 0
3 years ago
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