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forsale [732]
3 years ago
15

Plz answer for brainlist Brianna pays a phone company a basic

Mathematics
1 answer:
Vika [28.1K]3 years ago
3 0

Answer:

Hello! Your answer would be,

Step-by-step explanation:

Write as an inequality: x is at least 30. If ... The method we will use to solve applications with linear inequalities is very ... If he charges ?60 per job, how many jobs must he do to earn a profit of at least ?4,000 a month? ... Find your last month's phone bill and the hourly salary you are paid at your job. ... 30\text{°},60\text{°},90\.

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What is the answer to this promblem
galina1969 [7]

9514 1404 393

Answer:

  • to eliminate x: multiply the first by 3, and the second by -4
  • to eliminate y: multiply the first by 2, and the second by 5

Step-by-step explanation:

Pick the variable you want to eliminate. Determine the coefficients of that variable in the two equations. Negate one of them. Multiply each equation by the coefficient that came from the other equation.

__

<u>To eliminate x</u>

The x-coefficients are 4 and 3. If we negate 4, then the resulting y-coefficient will be positive. We choose to multiply the first equation by 3, the second by -4.

Here is the result of adding those:

  3(4x +5y) -4(3x -2y) = 3(7) -4(-12)   ⇒   23y = 69

<u>To eliminate y</u>

The y-coefficients are 5 and -2. If we negate -2, then the resulting x-coefficient will be positive. We choose to multiply the first equation by 2 and the second by 5.

Here is the result of adding those:

  2(4x +5y) +5(3x -2y) = 2(7) +5(-12)   ⇒   23x = -46

7 0
3 years ago
Read 2 more answers
Could anyone help me solve this problem please?
zepelin [54]
The answer is 3s squared over r to the 4th

it should look like a fraction with 3s squared as the numerator (on top) && r to the 4th as the denominator (on bottom) 

hope this was helpful, math is my strength so post more if you need help!


3 0
4 years ago
Multiply and simplify: –3x2y2 • y4x3
barxatty [35]
–3x^2y^2 • y^4x^<span>3
= -3x^5y^6

hope it helps</span>
7 0
3 years ago
Read 2 more answers
Please help find the percent of decrease?!
Novosadov [1.4K]
\frac{40}{55} = \frac{x}{100} \\ \frac{4000}{55} = x \\ 72.73 = x \\ 100 - 72.73 = 27.27
So the answer is 27.27% approximately
4 0
3 years ago
Part a : find the value of y.
uranmaximum [27]
Part A...Y=9, Part B, m=54 degrees
5 0
4 years ago
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