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2 years ago

McKenna pays $16 per month for a gym membership. In addition, she pays $2 per Pilates class.

Mathematics

1 answer:

sashaice [31]2 years ago

6 0

Answer:

No, she isnt being charged the right amount. she should be charged $40.

Step-by-step explanation:

cost(c)=16+2(12)

c= 16+24

c=40

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The length of a rectangle is 5 ft less than three times the width, and the area of the rectangle is 50 ft². Find the dimensions

Mariulka [41]

Answer

Length = 10 ft

Width = 5 ft

Explanation

Area of the rectangle given = 50 ft²

Let the width of the rectangle be x

So this means the length of the rectangle will be 3x - 5

What to find:

The dimensions of the rectangle.

Step-by-step solution:

Area of a rectangle = length x width

i.e A = L x W

Put A = 50, L = 3x - 5, W = x into the formula.

$\begin{gathered} 50=(3x-5)x \\ 50=3x^2-5x \\ 3x^2-5x-50=0 \end{gathered}$

The quadratic equation can now be solve using factorization method:

$\begin{gathered} 3x^2-5x-50=0 \\ 3x^2-15x+10x-50=0 \\ 3x(x-5)+10(x-5)=0 \\ (3x+10)(x-5)=0 \\ 3x+10=0\text{ }or\text{ }x-5=0 \\ 3x=-10\text{ }or\text{ }x=5 \\ x=-\frac{10}{3}\text{ }or\text{ }x=5 \end{gathered}$

Since the dimension can not be negative, hence the value of x will be = 5.

Therefore, the dimensions of the rectangle will be:

$\begin{gathered} Length=3x-5=3(5)-5=15-5=10\text{ }ft \\ \\ Width=x=5\text{ }ft \end{gathered}$

7 0

10 months ago

0.09×0.7 <br>help me please

dem82 [27]

0.09x0.7= 0.063

That its the answer

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3 years ago

Annie earns $15 per hour babysitting. How many hours will it take her to earn $60?

mrs_skeptik [129]

Answer:

4 hours

Step-by-step explanation:

15 x 4 = 60

$60

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3 years ago

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Two dice are rolled, and the sum of the face values is six. What is the probability that at least one of the dice came up a thre

gizmo_the_mogwai [7]

Answer : $P(\text{ atleast one of the dice come up 3})= \frac{1}{5}$

Explanation :

We know that ,

Sample space of " sum of faces is 6"= $\{(3,3),(4,2),(2,4),(5,1),(1,5)\}$

Atleast one of the dice come up 3 = $\{(3,3)\}$

So,

$Probability = \frac{\text{No. of favourable outcomes}}{\text{Total no. of outcomes}}$

$P(\text{ atleast one of the dice come up 3})= \frac{1}{5}$

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