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3 years ago

What is the product? (5r + 2)(3r − 4)

Mathematics

2 answers:

Novay_Z [31]3 years ago

8 0

15r^2 - 14r -12 is the correct answer

vovangra [49]3 years ago

5 0

THIS is the answer; I am certain. (The other respondent made an error.)

15r^2 - 14r - 8

You might be interested in

4/7 divided by 1 3/4

poizon [28]

Answer:

16/49

Step-by-step explanation:

4/7 ÷ 1 3/4

Convert 1 3/4 into an improper fraction

4/7 ÷ 7/4

Find the reciprocal of 7/4 and multiply

4/7 * 4/7

16/49

Hope this helps :)

7 0

3 years ago

John bought a crate of floor tiles $100. The crate had 5 boxes of floor tiles. Each box contained 40 floor tiles. What is the co

mash [69]

$0.50.
There are a total of 200 tiles (5 x 40)
since John paid $100 for the 200 tiles,
We have to do $100 divided by 200.
Which is .5
So $.50

4 0

2 years ago

Read 2 more answers

I need help PLEASE!!!

Stella [2.4K]

9514 1404 393

Answer:

y = -4/3x +23/2

Step-by-step explanation:

The tangent of interest is perpendicular to the radius at the given point on the circle. To find the perpendicular, it helps to know the slope of the radius segment. To find that, we need the center of the circle.

The center of the circle can be found by completing the square for each variable.

(x^2 -2x) +(y^2 +4y) = 20

(x^2 -2x +1) +(y^2 +4y +4) = 20 +1 +4

(x -1)^2 +(y +2)^2 = 25

Comparing this equation to the standard form equation for a circle, we can find the center.

(x -h)^2 +(y -k)^2 = r^2 . . . . . . . circle of radius r centered at (h, k)

The center of circle P is (1, -2).

The slope m' of the line segment between (1, -2) and (5, 1) is given by ...

m' = (y2 -y1)/(x2 -x1)

m' = (1 -(-2))/(5 -1) = 3/4

The slope m of the perpendicular line is the opposite reciprocal of this, so is ...

m = -1/m' = -1/(3/4) = -4/3

The y-intercept of the desired line can be found from ...

b = y -mx . . . . . . . for m=-4/3 and (x, y) = (5, 1)

b = 1 -(-4/3)(5) = 23/3

Then the equation of tangent line AB is ...

y = mx +b

y = -4/3x +23/3

6 0

3 years ago

Can someone help me find the surface area

Semenov [28]

Answer:

The general formula for the total surface area of a right prism is T. S. A. =ph+2B where p represents the perimeter of the base, h the height of the prism and B the area of the base.

if height equals 6.72 and width equals to 12.7 and length equals to 5.78,

Answer:

S = 395.1832 cm2

3 0

3 years ago

A company sells doughnuts. They incur a fixed cost of $23000 for rent, insurance, and other expenses. It costs $0.1 to produce e

olasank [31]

Answer:

C(x) = 0.1x+23000

Step-by-step explanation:

Given that a company sells doughnuts. They incur a fixed cost of $23000 for rent, insurance, and other expenses. It costs $0.1 to produce each doughnut. The company sells each doughnut for $0.2.

Let X be the no of units produced

Then we have variable cost = 0.1x

Fixed cost = 23000 (irrespective of value of x)

Total cost

$C(x) = 0.1x+23000$