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Mashutka [201]
2 years ago
7

Evaluate ab for a = 2 3/4 and b = 4/5.

Mathematics
2 answers:
ikadub [295]2 years ago
7 0

Answer:7 1/2

Step-by-step explanation:

Crazy boy [7]2 years ago
6 0

Rewrite a as an improper fraction:

2 3/4 = 11/4

Now you have 11/4 x 4/5

Multiply the two top numbers together and the two bottom numbers together.

11x4 / 4x5 = 44/20 now rewrite as 2 4/20 which can simplify to 2 1/5

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Which of the following lines is perpendicular to the line Y = 3x -4
andriy [413]

Answer:

D.

Step-by-step explanation:

When a line is perpendicular to another, their slopes will be opposite reciprocal. For example, 1 would be -1, -3 would be \frac{1}{3} , and \frac{5}{1} would be -5. The equation is written in slope-intercept form:

y=mx+b

m is the slope, so find the equation with the opposite reciprocal of 3, -\frac{1}{3}:

y=-\frac{1}{3} x+4 is the only option with the correct slope, so the answer is D.

6 0
3 years ago
Nora is in the business of manufacturing phones. She must pay a daily fixed cost to rent the building and equipment, and also pa
vaieri [72.5K]

9514 1404 393

Answer:

  c = 150p + 1000

Step-by-step explanation:

We know the variable cost is 150 per phone, so the total cost will be ...

  c = 150p +b . . . . for some value b

We also know the value of c for 8 phones, so we can find b:

  2200 = 150(8) + b

  2200 -1200 = b = 1000

Then the desired equation is ...

  c = 150p + 1000

5 0
2 years ago
Pls do 4 and 5 for me <3
WINSTONCH [101]

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8 0
2 years ago
Help me out please simple
const2013 [10]

<u>A straight line is 180 degrees in measure</u>

<u>The straight line is made up of three angles</u>

           --> angle 1

           --> angle 2

           --> angle with a little square on it

                     (<em>angle with a little square means it is 90 degrees in measure)</em>

<u>Let's set up an equation</u>

    angle1 + angle2 + 90 = 180\\angle1 + 87 + 90 = 180\\angle1 = 3

Thus angle 1 is <u>3 degrees</u> or the <u>second choice</u>

<u></u>

Hope that helps!

5 0
2 years ago
Joey sells cars at Orange City Ford. He earns $350 a week plus $200 per car he sells. If he earned $1550 last week, how many car
Vladimir [108]

Answer:

Joey sold 6 cars

Step-by-step explanation:

Joey earns $350 per week + $200 per car he sells

The number of cars that he sold last week is unknown, so represent it with a variable, x.

Write an equation

$350 + $200x = $1,550

Subtract $350 from both sides of this equation

$200x = $1200

Divide both sides of the equation by 200

x = 6

Joey sold 6 cars

Hope this helps :)

7 0
3 years ago
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