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weqwewe [10]
2 years ago
10

Quentin agreed to pay 7% shipping and handling charge. If Quentin paid $9. 45 in shipping and handling, how much must the racque

t have cost?
Mathematics
1 answer:
Simora [160]2 years ago
5 0

<em>Answer:</em>

<em>The cost of the racquet is $135</em>

<em>Step-by-step explanation:</em>

<em>Let</em>

<em>x-----> the cost of the racquet</em>

<em>we know that</em>

<em>The racquet represent the 100%</em>

<em>so</em>

<em>using proportion</em>

<em />

<em>x/100%= $9.45/7%</em>

<em>x=100%*($9.45)/7</em>

<em>x=$135</em>

My math teacher help me with it.

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Evaluate 20 + 6x when x = 0.
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Step-by-step explanation:

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2/3 + n = 2n + 3 <== ur equation
2/3 - 3 = 2n - n
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or
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3 years ago
What is the answer to this decimal problem 0.32÷n=0.032
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6 0
3 years ago
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Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon
Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

h(t) ----> he height of the ball, in feet

we have

h(t)=-16t^2+40t+5

we know that

When the ball hits the ground, the height is equal to zero

so

-16t^2+40t+5=0

The formula to solve a quadratic equation of the form

at^{2} +bt+c=0

is equal to

t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-16t^2+40t+5=0

so

a=-16\\b=40\\c=5

substitute in the formula

t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}

t=\frac{-40\pm\sqrt{1,920}} {-32}

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t=\frac{-40-\sqrt{1,920}} {-32}=2.62\ sec

therefore

The solution  is t=2.62 seconds

4 0
3 years ago
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