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mezya [45]
3 years ago
5

In 15 years lisa will be four times as old as she is now. how old is she now

Mathematics
1 answer:
Eva8 [605]3 years ago
5 0

Answer:

Lisa is 5 years old

Step-by-step explanation:

we can make an equation like

4x=15+x

X can represent Lisa’s current age

Now just solve for X

3x=15

x=5

And we can check

If Lisa is 5 years old now

In 15 years she would be 20

And 20 is 4 times as 5 which Is her current age

So Lisa is 5 years old now.

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Answer:

The correct option is D) (5x − 2)(2x − 3).

Step-by-step explanation:

Consider the provided expression.

10x^2-19x+6

Where x is time in minutes.

We need to find the appropriate form of the expression that would reveal the time in minutes when the trough is empty.

When the trough is empty the whole expression becomes equal to 0.

Substitute the whole expression equal to 0 and solve for x that will gives us the required expression.

10x^2-19x+6=0

10x^2-15x-4x+6=0

5x(2x-3)-2(2x-3)=0

(5x-2)(2x-3)=0

Now consider the provided option.

By comparison the required expression is D) (5x − 2)(2x − 3).

Hence, the correct option is D) (5x − 2)(2x − 3).

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3 years ago
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Step-by-step explanation:

By using Ms Excel you should do this problem.

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2 years ago
Multiply and write the solution in scientific notation: 3.2 x 10^2 x 10^5
vlabodo [156]

Answer:

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3 years ago
Find the x-y intercepts of the graph 3x+2y=12
Olin [163]

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8 0
3 years ago
Read 2 more answers
1. Erwin hiked 5/7 of a kilometer while
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Answer:

the number of kilometers hiked in all is \frac{29}{21}

Step-by-step explanation:

The computation of the number of kilometers hiked in all is shown below:

= Erwin + Jericho

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Hence, the number of kilometers hiked in all is \frac{29}{21}

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