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Soloha48 [4]
3 years ago
6

I'm not very good at math so I really need help​

Mathematics
2 answers:
olasank [31]3 years ago
7 0

Answer:

C

Step-by-step explanation:

-15 x 2x = -30x

-15 x -6 = 90

Fudgin [204]3 years ago
5 0

Answer:

c)-15(2x-6)

Step-by-step explanation:

i think!

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A population culture begins with 15 strands of bacteria and then doubles every 4 hours. This can be modeled as 15(2)t/4, where t
MrRissso [65]

Answer:

It should be 120 because it’s doubles 3 times

Step-by-step explanation:

Since every 4 hours it doubles and 4 times 3 is 12 you double the strand 3 times giving you 120

3 0
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Pens and Pencils
Lina20 [59]
Pen=x
Pencil=y
y+0.15=x
y+x=0.69
y+y+0.15=0.69
2y=0.69-0.15
2y=0.54
y=0.54/2
y=0.27 pencils
y+0.15=x
0.27+0.15=x
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Supplier is right about a priče.

6 0
3 years ago
The photo printed has length of 6 imams width of 4. A smaller picture is printed the ratio of the new picture to the size of the
Serggg [28]
We know the width of the first picture, is 4
we know the ratio from smaller to larger is 1.5:2

thus     \bf \cfrac{\textit{width of small}}{\textit{width of large}}\qquad 1.5:2\implies \cfrac{1.5}{2}=\cfrac{w}{4}

solve for "w".

we know the length of the first picture, 6

\bf \cfrac{\textit{length of small}}{\textit{length of large}}\qquad 1.5:2\implies \cfrac{1.5}{2}=\cfrac{L}{6}


solve for "L".
3 0
4 years ago
Lisa takes 3 hours to mow the lawn, while her cousin, Barb, takes 2 hours. How long will it take them working together?
Colt1911 [192]

Answer:6 hours

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5 0
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Graph each piecewise function. Then identify the properties.
soldier1979 [14.2K]

Answer:

Domain: (-∞, 0] U (0, ∞): All real numbers.

Range: (-∞, ∞)

Step-by-step explanation:

This function is composed of two polynomial functions, a quadratic whose domain is all real numbers and a negative slope whose domain is all real numbers.

Observe in the attached graph that the function is continuous for the whole domain, it does not have any jump. In addition, the parabolic function comes from ∞, then it has a minimum value in y = 1 it grows up to y = 4. Finally it joins with the equation of the line and it extends to -∞.

Then we can conclude that for this piecewise function:

Domain: (-∞, 0] U (0, ∞): All real numbers.

Range: (-∞, ∞)

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