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saw5 [17]
3 years ago
10

(Due in 20 minutes!)

Mathematics
1 answer:
sergey [27]3 years ago
6 0

Answer:

PLAN A

$840-$180=$660

In 1 week = $60

how many weeks = $660

<u>$</u><u>6</u><u>6</u><u>0</u><u> </u><u>×</u><u> </u><u>1</u><u> </u><u>week</u>

$60

==== it will take 11weeks..

PLAN B.

In 1 week = $70

how many weeks= $840

<u>$</u><u>8</u><u>4</u><u>0</u><u> </u><u>×</u><u> </u><u>1</u><u> </u><u>week</u>

$70

====It will take 12weeks

PLAN A IS THE CORRECT ANSWER IT ONLY TAKES 11 WEEKS

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Firdavs [7]

We are given :

\sqrt{4x^{2}-20x+25}

Step 1: factor the part inside square root

The function given inside square root is of quadratic form.

So let us try to factorise it using AC method.

Here A*C = 4*25 = 100

so we have to find factors of 100 that add up to give -20.

the two factors are -10 and -10.

Rewriting the function :

4x^{2} -20x+25

=4x^{2} -10x-10x+25

=2x(2x-5) - 5(2x-5)

=(2x-5)^{2}

Step 2:

Now we take square root of the factorised form

\sqrt{(2x-5)^2}

= 2x-5

Answer : (2x-5)

3 0
3 years ago
Solve 90x = 81+25x^2​
qwelly [4]

Answer:

1.8

Step-by-step explanation:

Solve for x

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Factor the left side of the equation.

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−

(

5

x

−

9

)

2

=

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Multiply each term in

−

(

5

x

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(

5

x

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Exact Form:

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Decimal Form:

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Mixed Number Form:

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6 0
3 years ago
The sum of two numbers must be 14 or greater. The product of the two numbers must be less than 40. Which system of inequalities
Anettt [7]

Answer:

A

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x+y≥14

xy<40

4 0
3 years ago
The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal with a
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218, 314 are the two values do the middle 95% of the lengths of all pregnancies fall.
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How fast is a train going that makes a 330 mile trip in 4 hours.?
maw [93]

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8 0
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