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3 years ago

Aidan has $150. He wants to buy a book that is

Mathematics

1 answer:

olga_2 [115]3 years ago

8 0

Answer:yes he has enough

Step-by-step explanation:

Markdown: 25% of 180. 25%x180 0.25x180=$45. The markdown is $45 sale price: 180-45=$135. Sales tax:8.25%x135 0.0825x135=11.1375(not rounded)=11.40(rounded) Add: 135+11.1375 to get 146.1375(not rounded)= 146.40(rounded)

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What is “- 7(x+8)” ?

dsp73

Answer:

-7x-56

Step-by-step explanation:

8 0

4 years ago

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Mike earned $11.76 per hour for working 23.5 hours last week. how much money did mike earn last week?

densk [106]

Just multiply.

11.76 * 23.5= 276.36

So Mike earned $276.36 last week

6 0

3 years ago

Mrs. Hwang is taking her vehicle to the shop to have the gas tank expanded by 10 gallons. Now, it costs her $42.56 to fill the t

harina [27]

Answer:

Proportion states that the two fractions or ratios are equal

As per the statement: Mrs. Hwang is taking her vehicle to the shop to have the gas tank expanded by 10 gallons. Now, it costs her $42.56 to fill the tank. Once the new tank is in, it will cost her $72.96

Let the tank size now be x

Since, the gas tank expanded by 10 gallons = x + 10

by definition of proportion ;

$\frac{x}{42.56}=\frac{x+10}{72.96}$

by cross multiply we get;

$72.96x = 42.56(x+10)$

using distributive property; $a\cdot (b+c) =a\cdot b + a\cdot c$

$72.96x = 42.56x+425.6$

Subtract 42.56x from both sides we get;

$30.4x =425.6$

Divide both sides by 30.4 we get;

x = 14

Therefore, the tank is her now is, 14 gallons

5 0

3 years ago

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Which property refers to "regrouping" the terms in the expression 9 (2-x) = 18 - 9x ?

Aliun [14]

The answer is C- Distributive Property because you times everything in the bracket by the value connected to it:
9 times 2=18
9 times x = 9x
= 18 - 9x

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3 years ago

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Mateo teaches a continuing education class at the library on tuesday nights. he estimates that 75% of his students are satisfied

vredina [299]

The computed value must closely match the real value for a model to be considered valid. If the percentage of pleased or very satisfied students remains close to 75% after Mateo surveys additional students, Mateo's model is still viable. The model is faulty if the opposite is true.

<h3>How will mateo know whether his model is valid or not?</h3>

In general, a valid model is one whose estimated value is close to the real value. This kind of model is considered to be accurate. It must be somewhat near to the real value if it doesn't resemble the real value.

If the findings of the survey are sufficiently similar to one another, then the model may be considered valid.

P1 equals 75%, which is the real assessment of the number of happy pupils

P2 is 70 percent; this represents the second assessment of happy pupils

In conclusion, The estimated value of a model has to be somewhat close to the real value for the model to be considered valid. If the number of students who are either pleased or extremely satisfied remains close to 75 percent following Mateo's survey of more students, then Mateo's model is likely accurate. In any other scenario, the model cannot be trusted.