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3 years ago

Please help!!!!!I’ll mark you as brainliest!!!!!!

Mathematics

2 answers:

statuscvo [17]3 years ago

8 0

Answer: B $50,700

Step-by-step explanation: Subtract expenses from earnings...

65,000-4,900-7,400-2,000=50,700

ch4aika [34]3 years ago

3 0

Use the u it so it can work out of

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A cement mixture costs $33 a ton. It is composed of Grade A cement at $36 a ton and Grade B cement at

Inessa05 [86]

If we used “a” tons of grade A and “b” tons of grade B we would get a + b tons of mixture.
Converting to costs we get 36a + 24b = 33(a + b)
36a + 24b = 33a + 33b
36a - 33a = 33b - 24b
3a = 9b
a = 3b
This means the mixture contains 3 times as much of grade A than grade B
The ratio of grade A : grade B = 3 : 1

For example if we mixed 3 tons of A with 1 ton of B we would get 4 tons of mixture
The cost would be 3 x 36 + 1 x 24 = 108 + 24 = $132 for 4 tons = $33 per ton

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3 years ago

450 students are graduating from Big Lake High School this year. 68 percent of these students plan to go to college next year. 1

lidiya [134]

68%(plan to go to college) + 14%(plan to start working) = 82%
100% - 82% = 18% (students don't know what they're going to do )

450 x 0.18 = 81

answer: 81 students are not sure what they are going to do after graduating from high school

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4 years ago

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72 times 73? Need help answering

Mkey [24]

The answer is 5256.

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3 years ago

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Which of these statements is correct?

tatuchka [14]

Answer:

The system of linear equations 8x - 3y = 10 and 16x - 6y = 22 has no solution is correct.

Step-by-step explanation:

1) The system of linear equations 6x - 5y = 8 and 12x - 10y = 16 has no solution.

Solve these linear equations simultaneously

Step 1 : Find y in terms of x from any one equation

6x - 5y = 8

y = 8 - 6x

-5

Step 2 : Substitute y in terms of x from step 1 in the second equation.

16x - 6y = 22

16x - 6 (8 - 6x) = 22

-5

80x - 48 + 36x = 22 x -5

94x = 43

x = 0.457

This statement is incorrect as it does have a solution.

2) The system of linear equations 7x + 2y = 6 and 14x + 4y = 16 has an infinite number of solutions.

Solve these linear equations simultaneously

Step 1 : Find y in terms of x from any one equation

7x + 2y = 6

y = 6 - 7x

Step 2 : Substitute y in terms of x from step 1 in the second equation.

14x + 4y = 16

14x + 4(6 - 7x) = 16

14x + 12 - 14x = 16

0 ≠ 4

This statement is not true as there are no solutions.

3) The system of linear equations 8x - 3y = 10 and 16x - 6y = 22 has no solution.

Solve these linear equations simultaneously

Step 1 : Find x in terms of y from any one equation

8x - 3y = 10

x = 10 + 3y

Step 2 : Substitute x in terms of y from step 1 in the second equation.

16x - 6y = 22

16(10 + 3y) - 6y = 22

20 + 6y - 6y = 2

0 ≠ -18

This statement is true because there are no solutions

4) The system of linear equations 9x + 6y = 14 and 18x + 12y = 26 has an infinite number of solutions.

Solve these linear equations simultaneously

Step 1 : Find x in terms of y from any one equation

9x + 6y = 14

x = 14 - 6y

Step 2 : Substitute x in terms of y from step 1 in the second equation.

18x + 12y = 26

18 (14 - 6y) + 12y = 26

8 - 12y + 12y = 26

0 ≠ 18

This statement is incorrect because there are no solutions. It does not have infinite number of solutions.

!!

8 0

3 years ago

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Chris is calculating his deductions for his tax return. He is filing singly. He can claim $1,813 from property taxes, $1,513 fro

zalisa [80]

The standard deduction compare to Chris’s deductions is letter D which is "The standard deduction is $664 better than Chris’s deductions."

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

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3 years ago