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nasty-shy [4]
3 years ago
15

I need to know the answer, workout, and explanation of this problem

Mathematics
1 answer:
emmainna [20.7K]3 years ago
6 0

20/ 18 = 1.11111

90/2.5 = 36

20/1.5 = 1.33333333

3 2/3 (3.666)/ 15 = 0.2444

So the answer is B


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I need help —30 POINTS——<br> 22.) Please!
GrogVix [38]

Answer:

a.  there are sometimes infinitely many solutions to the system

b. will always have one solution

c.  There is never any solution for the system

Step-by-step explanation:

22a  If two lines have the same slope, they can either be parallel lines which never intersect and have no solution or the same line which have infinite solutions.  So  there are sometimes infinitely many solutions to the system depending on if they are the same line or are parallel lines

b  If the lines have different slopes, they will eventually intersect each other at a point, so they will always have one solution


c.  If the lines have the same slope and a different y intercept, they are parallel lines and will never intersect.  There are no solutions when they never intersect. There is never any solution for the system

8 0
3 years ago
Which of the following are the factors of m2 – 14m 48?
andrew-mc [135]
Hello,

Answer B

m²-14m+48=m²-8m-6m+48=m(m-8)-6(m-8)=(m-8)(m-6)
7 0
3 years ago
If f(t)= 3t^2-2, find f(k-2)
DedPeter [7]
By plugging (k-2) in t, we can write that
f(k-2)=3(k-2)^{2}-2=3(k^{2}-4k+4)-2=3 k^{2}-12k+12-2=3 k^{2}-12k+10
7 0
4 years ago
-x+y+z=-1<br> -x+4y-5z=-16<br> 5x-4y-7z=0
ehidna [41]

Answer:

8

Step-by-step explanation:

3 0
3 years ago
When Joey mowed lawns for 10 hours and walked dogo
ankoles [38]

The charges for mowing lawns are $5 per hour and charges for walking dogs are $3 per hour.

Step-by-step explanation:

Let,

x be the charge per hour for mowing lawns

y be the charge per hour for walking dogs

According to given statement;

10x+4y=62    Eqn 1

8x+5y=55      Eqn 2

Multiplying Eqn 1 by 5

5(10x+4y=62)\\50x+20y=310\ \ \ Eqn\ 3

Multiplying Eqn 2 by 4

4(8x+5y=55)\\32x+20y=220\ \ \ Eqn\ 4\\

Subtracting Eqn 4 from Eqn 3

(50x+20y)-(32x+20y)=310-220\\50x+20y-32x-20y=90\\18x=90

Dividing both sides by 18

\frac{18x}{18}=\frac{90}{18}\\x=5

Putting in Eqn 1

10(5)+4y=62\\50+4y=62\\4y=62-50\\4y=12

Dividing both sides by 4

\frac{4y}{4}=\frac{12}{4}\\y=3

The charges for mowing lawns are $5 per hour and charges for walking dogs are $3 per hour.

Keywords: linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/2821386
  • brainly.com/question/2860697

#LearnwithBrainly

5 0
3 years ago
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