3 years ago

Which of the following are points are solutions to the equation 3x-4y-8=12 ? Select all that apply.

Mathematics

1 answer:

Greeley [361]3 years ago

7 0

(0,5)
(4,-2)
(-16,17)

just substitute the x and y values from each coordinate into the equation

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Kevin bicycles a total of 2,340 miles last year. On average, about how many miles did he bike each week? 195 45 44 46

svlad2 [7]

In order to find the average you have to add up all the data values and then find the sum of the data values.

$195 + 45 + 44 + 46 = 330\\\frac{330}{4} = 82.5\\\\$

So on average he ran about 82.5 miles.

7 0

3 years ago

The length of a rectangle is 5 Inches more than its width, x. The area of a rectangle can be represented by the equation

Paul [167]

Answer:

Factor:

x^2+5x-300=0

(x-15)(x+20)=0

x=15 is the width

x+5=20 is the length

Step-by-step explanation:

4 0

3 years ago

If x^3+y^3−12xy+64=0, what is the value of x+y?

jok3333 [9.3K]

Answer:

I don't know

Step-by-step explanation:

I don't really know but if you want help with math questions try this website called wolfram alpha. It's great

5 0

3 years ago

Line EF is the median of the trapezoid ABCD. The median connects the midpoint of the legs of a trapezoid. Use the diagram to fin

FromTheMoon [43]

Answer:

median: 15
base: 18

Step-by-step explanation:

The median is the average of the lengths of the two bases:

5x -20 = (12 + (4x -10))/2

5x -20 = 2x +1

3x = 21 . . . . . add 20-2x

x = 7

Then the lengths are ...

median = 5x -20 = 5·7 -20 = 15

base = 4x -10 = 4·7 -10 = 18

6 0

3 years ago

The length of a picture frame is 2 inches more than the width. The perimeter of the frame is 36 inches. What is the length of th

sveta [45]

Let the width be $x$
∴the length = $x+2$
perimeter=2(l+b)
36= $2(x+2+x)$
36= $2(2x+2)
=4x+4$
$4x=32 x=8$
∴∴the length = $x+2 = 8+2
 =10$

3 0

3 years ago