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3 years ago

5. Which of the following equations would

Mathematics

1 answer:

Finger [1]3 years ago

7 0

Answer:

Step-by-step explanation:

for A if you subtract 3 from both sides and divide by 10 from both you get x = 0 so that has infinate solutions

for B you add 8 to both sides and divide by 16 getting the same thiong as A

For C you ditribut 4 to 2x and -3 getting 8x-12=8x-12 if you solve it you get the answer as A & B

For D if you subtract 12 from one side you get -6x = -6x -12 (-12)

causing you not to be able to solve it

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Please help! I am so confused on this, I've probably been stuck on it for at least an hour.

julsineya [31]

9514 1404 393

Answer:

see attached for the drawing

slope = -1/2

Step-by-step explanation:

For the rise of -1 and the run of 2, the slope is ...

m = rise/run = -1/2 . . . . slope in simplest form

Additional comments

It usually works best if you can identify points on the graph where the line crosses grid intersections. Then the number of squares in each direction can be counted easily. If you work with two grid intersections that are closest together, then the ratio of rise to run will already be in reduced form.

On this graph, there are other grid crossing points that are 4, 6, 8 units to the right or left of the one where we started. You need to remember that "run" is positive in the "right" direction, and "rise" is positive in the "up" direction.

We have shown the "rise" and "run" lines above the graphed line. They can also be shown below the graphed line.

Here, the grid squares are 1 unit in each direction. You need to pay attention to the scale, because some graphs have different numbering vertically than horizontally. The values for "rise" and "run" need to be figured using the appropriate scale.

5 0

3 years ago

What is the answer to 3(2-t)/4 = 3t/4

egoroff_w [7]

Answer:

t=1

Step-by-step explanation:

First we distribute

[3(2-t)]/4=3t/4

(6-3t)/4=3t/4

Then we multiply both sides by 4 to cancel out the denominator

6-3t=3t

Add 3t to both sides

6t=6

Divide both sides by 6

t=1

8 0

3 years ago

[(y+4)/(y+7)]+1=(y+3)/(y+1)

Sunny_sXe [5.5K]

First note that y cannot equal -7 or -1 as division by zero is undefined. So that if it comes up in our solution we know that it is not a real solution.

[(y+4)/(y+7)]+1=(y+3)/(y+1) make the left side have a common denominator

(y+4+y+7)/(y+7)=(y+3)/(y+1) combine like terms on left side

(2y+11)/(y+7)=(y+3)/(y+1) cross multiply

(2y+11)(y+1)=(y+3)(y+7) expand

2y^2+13y+11=y^2+10y+21 subtract y^2 from both sides

y^2+13y+11=10y+21 subtract 10y from both sides

y^2+3y+11=21 subtract 21 from both sides

y^2+3y-10=0 expand so factoring is easier

y^2-2y+5y-10=0 factor

y(y-2)+5(y-2)=0 which is equal to

(y+5)(y-2)=0

y=-5 or 2

6 0

3 years ago

Simplify -12w + 7w - 3 - 6

aleksley [76]

Answer: Hi!

We can simplify this by combining like terms:

-12w + 7w - 3 - 6

-12w + 7w = -5w

-3 - 6 = -9

Out equation now looks like this:

-5w - 9

There's nothing left to simplify, so we're done!

Hope this helps!

6 0

3 years ago

A tower is composed of a prism with a square base and a pyramid. The base length is 20 meters, and the height of the prism is 40

vovikov84 [41]

Answer:

a. 400√2 + 3,600 m2

Step-by-step explanation:

just answered this question ;)

5 0

3 years ago

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