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2 years ago

Dana records the heights and the shoe sizes of the girls on her volleyball

Mathematics

2 answers:

Elenna [48]2 years ago

5 0

Answer:

Step-by-step explanation:

if x = 4, plug that value into the equation

y = 2*4 + 52

y = 8 + 52

y = 60

tamaranim1 [39]2 years ago

3 0

Answer: The answer is A

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The average value of two positive numbers is 30% less than one of the two numbers. By which percentage is average value bigger t

Viefleur [7K]

Answer:

75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

So:

$Average = \frac{x + y}{2}$

And:

$Average = (1 - 30\%) * x$ -----30% less than x

Substitute $Average = (1 - 30\%) * x$ in $Average = \frac{x + y}{2}$

$\frac{x + y}{2} = (1 - 30\%) * x$

$\frac{x + y}{2} = (1 - 0.30) * x$

$\frac{x + y}{2} = 0.70 * x$

$\frac{x + y}{2} = 0.70x$

Cross multiply

$x + y = 0.70x * 2$

$x + y = 1.40x$

Collect like terms

$1.40x - x = y$

$0.40x = y$

Make x the subject

$x = \frac{y}{0.40}$

$x = 2.50y$

So, the average is:

$Average = (1 - 30\%) * x$

$Average = (1 - 30\%) * 2.50y$

$Average =0.70 * 2.50y$

$Average =1.75y$

Rewrite as:

$Average =(1 + 0.75)y$

Express as percentage

$Average =(1 + 75\%)y$

This means that the average is 75% bigger than the second number

6 0

2 years ago

Which phrase matches the algebraic expression below?

Stella [2.4K]

Answer:

O Two times x minus seven plus ten

8 0

2 years ago

Ben is standing 8 feet from

never [62]

Answer:

Approximately 15.05 ft

Step-by-step explanation:

You need to use tangent for this question.

Since tan θ = $\frac{Opposite}{Adjacent}$

to find the Opposite, we need to rearrange the equation to:

Adjacent × tan θ = Opposite.

So if you insert 62 for θ and 8 feet for Adjacent, you will get:

8 × tan(62) = Opposite.

and you will get approximately 15.05 feet for your Opposite side

5 0

2 years ago

Can someone please help?

Alecsey [184]

Answer:

73 degrees

Step-by-step explanation:

6 0

2 years ago

I donot understand at all

loris [4]

Answer:

sorry i dont understand either!!!

Step-by-step explanation:

8 0

2 years ago