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sdas [7]
3 years ago
7

Create an example of a linear system that would best be solved using the substitution method. Explain your reasoning.

Mathematics
1 answer:
Readme [11.4K]3 years ago
5 0
In your change cup you have 28 coins.  All of which are nickels and quarters.  Together they add up to $4.  How many coins do you have of each. 
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Bob bought a boat for $20.00 and sold it at a loss of $8.00. What was the selling price?
qwelly [4]

he sold it for $12.00

7 0
3 years ago
The fish tank has 60 fish. 12 of the fish have spots. What percent of the fish have spots?
kumpel [21]

Answer:

20%.

Step-by-step explanation:

3 0
3 years ago
Solve for the inequality? <br> A OR B?
ASHA 777 [7]

Step-by-step explanation:

3x - x = 2x

2(x + 2) = 2x + 2

for every number of x, 2x + 2 would always be larger than 2x.

so there is no solution, since the given equation is 2x is greater than 2x + 2.

6 0
3 years ago
One freezer costs $623.95 and uses 90 kilowatt hours (kwh) of electricity each month. A second freezer costs $500 and uses 100 k
lutik1710 [3]

The minimum electric rate in cents per kwh for which the 12-year total cost will be less for the first freezer is 8.61 cents

<h3>How to calculate the rate?</h3>

Let x =  minimum electric rate (Cents/kWh)

Total months in 12 years is 12*12 = 144 m

1st freezer

Total cost over 12 years is

623.95 (cost) + (90 kWh/m)*(144 m)(x/100 $/kWh)

= 623.95 + 129.6x

2nd freezer

Total cost over 12 years is

500 + 100*144*(x/100)

= 500 + 144x

For the 1st freezer to cost less over 12 years,

623.95 + 129.6x < 500 + 144x

123.95 < 14.4x

8.61 < x

The minimum rate is 8.61 cents per kWh

Learn more about rate on:

brainly.com/question/25537936

#SPJ1

8 0
2 years ago
Please help asap 55 pts
bixtya [17]
B can be eliminated, as 10x and 4x multiply to 40x^2, which is not in the expression.

The greatest common factor of all coefficients in the equation is 2. Divide all coefficients by 2 to get the following equation:

2(10x^{2} + 11x - 6)

We will leave out this coefficient, 2, for now.

We'll need to find the factors of c:

c = -6
Factors of 6: {1,2,3,6}

The only factors in the answer choices that fit this are 2 and 3. D can be eliminated.

5x and 2x multiply to 10x^2. 5x and 2x also modify what b will equal. Use the answer choices A and C to find b:

A.
(5x * -3) + (2x * 2) = -15x + 4x = -11x

C.
(5x * 3) + (2x * -2) = 15x - 4x = 11x

Answer C comes up with the correct b value.

The answer is C. 2(5x - 2)(2x + 3).
5 0
3 years ago
Read 2 more answers
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