Mr. Wong wants to purchase 12 new smoke detectors for his house. Store A sells each smoke detector for $17 and Store B sells each smoke detector for $24. If Mr. Wong purchases all his smoke detectors at Store A, how much less will he spend than if he purchased all the smoke detectors at Store B?

Answers

Answer 1

Answer:

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The amountlessspend by buying in store Athan in store B is $84

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

The number of smokedetectors to be purchased.

= 12

Store A:
Cost of one smokedetector = $17

Cost of 12 smokedetectors.

= 12 x 17

= $204

Store B:

Cost of one smokedetector = $24

Cost of 12 smokedetectors.

= 12 x 24

= $288

Now,

The difference between the cost of 12 smokedetectors from store A to store B.

= $288 - $204

= $84

Thus,

The amountlessspend by buying in store Athan in store B is $84

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Answer 2

Answer:

Answer:

$84

Step-by-step explanation:

so for store A, you would do $17*12 smoke detectors, Which would give you $204. For store B you would do $24*12 smoke detectors. That is $288. Now all you do is 288-204=84. You would save $84 dollars going to store A

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I could use some help here

Answers

Answer:

3x^3 + 6x^2

Step-by-step explanation:

2x^2 + 3x^3 + 4x^2

Combine like terms

3x^3 + (2x^2+4x^2)

3x^3 + 6x^2

Answer:

b. 6 x² + 4 x³

Step-by-step explanation:

2x ² + 3x³ + 4x²

Combine like terms, we get

2 x² + 4 x² + 3 x³

6 x² + 3 x³

option a and b both are similar.

You want to put $2,500 in a simple interest account. It has a 4% annual interest rate. How long will it take you to earn $200 in interest?

Answers

find 4% and find how many times (years) it takes to get to 200

2500 times 4%=2500 times 0.04=100

100 times how many years=200
divide by 100 both sides
how many years=2

2 years

50 because all you have to do is divide 4 by 200 and it comes up 50 YAY!!!!!!!!!!Hope this helps.

What is percent of increase from 15 to 60?

Answers

Answer: 300 percent

Step-by-step explanation:

Where: 15 is the old value and 60 is the new value. In this case we have a positive change (increase) of 300 percent because the new value is greater than the old value.

Answer:

400%

Step-by-step explanation:

60/15 = 4

4 * 100 = 400 %

How to solve for x 8(4-x)= 7x+2

Answers

8 ( 4 - x ) = 7x + 2
32 - 8x = 7x + 2
      -7x     -7x
--------------------------
32 - 15x = 2
-32           -32
----------------------------
-15x = -30
/-15      /-15

x = 2.

What is the probability a 1-6 number cube lands on a composite number? 0.25 0.33 0.50 0.875

Answers

a compsite number is a number that is NOT prime
technically 1 is not prime since the definition is divisible by 1 and itself
2 is prime
3 is prime
4 is not prime
5 is prime
6 is not prime

2 solutions for 2 different views:
A: 1 is prime
B: 1 is not prime

A: 1 is prime
so we have 1,2,3,5 are prime and 5 and 6 are not
probablity is (desired outcomes)/(total possible outcomes)
desired outcomes=2 (5 and 6)
total possible outcomes=6 (6 numbers on cube)
2/6=1/3=0.33
probabiligy is 0.33

B: 1 is not prime
if 1 is not prime then we have 2,3,5 as prime and 1,4,6 as not prime
probability is (desired outcomes)/(total possible outcomes)
desired outcomes=3 (1,4,6)
total posible outcomes=6 (6 faces on cube)
3/6=1/2=0.5
the probability is 0.5

TECHNICALLY 1 is not prime so the answe ris 0.5

Answer=0.5

To find probability, we must find out the chances of rolling and even number. Out of the 6 sides on a dice, only 3 are even. So 3/6 are even

3/6=0.5

How many 1/10 are in 3?

Answers

There are 30, 1/10's in 3.

What is Fraction?

Every fraction has a numerator and a denominator separated by a horizontal bar known as the fractional bar.

The denominator represents the number of components into which the whole has been subdivided. It is positioned below the fractional bar in the lower section of the fraction.
The numerator specifies how many fractionalparts are depicted or selected. It is positioned above the fractional bar in the upper section of the fraction.

We have to find number of 1/10's in 3.

Then, 3 x 10 / 1

= 3 x 10

= 30

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there are 30
1/10=o.1
and 3/0.1 = 30

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