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4 years ago

Simplify the rational expression

Mathematics

1 answer:

Anna71 [15]4 years ago

3 0

Answer:

the answer to this is

Step-by-step explanation:

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Mikayla bought 5 skirts at $x each. Three of the 5 skirts came with a matching top for an additional $9 each. Write and simplify

strojnjashka [21]

So Mikayla bought 5 shirts for $x dollars each
this part of the expression we can call 5x
then 3 of the shirts came with an additional $9 each. 9x3=27
so the expression is 5x+27

4 0

3 years ago

Eleven more than five times a number is equal to the difference between −38 and twice the number. Find the number.

Phantasy [73]

Answer:

x = -7

Step-by-step explanation:

Eleven more than five times a number is equal to the difference between −38 and twice the number.

let x represent the number.

11 + 5x = -38 - 2x

7x +11 = -38.............add 2x to both sides

7x = -49................... subtract 11 from both sides

x = -7........................divide both sides by 7

4 0

3 years ago

A taxi cab charges $0.55 per mile in addition to a $1.75 flat rate fee. Susie has $10 to spend on a taxi cab ride. The taxi driv

d1i1m1o1n [39]

Let y equal to the total fare and x is the mile of taxi ride. So the equation is

Y = 0.55x + 1.75

Since Susie has $10 to spend for a taxi cab, so he can have

10 = 0.55x + 1.75

X = 15 miles of taxi ride

So the system of inequality is

10 < 0.55x + 1.75

3 0

4 years ago

Please answer as fast as you can

777dan777 [17]

Answer:

d = 3072.2 ft

Step-by-step explanation:

<h2>Circumference of circle:</h2>

Circumference of circle = 9687 ft

πd = 9687

$\sf \dfrac{22}{7}*d = 9687\\$

$d = 9687 * \dfrac{7}{22}\\\\d = 3082.2 \ ft$

6 0

2 years ago

The paint used to make lines on roads must reflect enough light to be clearly visible at night. Let μ denote the true average re

tatuchka [14]

Answer:

We conclude that average reflectometer reading for a new type of paint is greater than 20

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 20

Sample size, n = 13

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 20\\H_A: \mu > 20$

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} } = 3.2$

Degree of freedom = n - 1 = 13 - 1 = 12

Now, we calculate the p-value with the help of standard table.

P-value = 0.004

Since, the p-value is less than the significance level, we fail to accept the null hypothesis and reject it.

Thus, there is enough evidence to support that average reflectometer reading for a new type of paint is greater than 20

5 0

3 years ago