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sleet_krkn [62]
3 years ago
13

I kinda need to show my work so please help me out. This is due in 10 minutes

Mathematics
1 answer:
HACTEHA [7]3 years ago
4 0
First day: 2 1/2= 2.5 hours
Second day: 4 1/4= 4.25 hours
When h is hours:
2.5h + 4.25h = 54
6.75h = 54
/6.75 /6.75
h= 8
Naomi charges $8 an hour to mow lawns. Hope this helps.
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Please Help! Show all the steps!
likoan [24]

You can start by subtracting different equations from each other.

3x + 2y + 3z = 1

subtract

3x + 2y + z = 7

2z = -6

divide by 2

z = -3

add the following two expressions together:

3x + 2y + z = 7

3x + 2y + 3z =1

6x + 4y + 4z = 8

subtract the following two expressions:

6x + 4y + 4z = 8

5x + 5y + 4z = 3

x - y = 5

^multiply the whole equation above by 3

3x - 3y = 15

subtract the following two expressions:

3x - 3y = 15

3x + 2y = 10

-5y = 5

divide each side by -5

y=-1

take the following expression from earlier:

x - y = 5

substitute y value into above equation

x - - 1 = 5

2 negatives make a positive

x + 1 = 5

subtract 1 from each side

x = 4

Therefore x = 4, y = -1, z = -3

I checked these with all 3 equations and they worked :)

(it's quite complicated, comment if you don't understand anything) :)

7 0
3 years ago
A family spent a total of $1946 on fast food this year. If this family decreases the amount it spends on fast food by 3% every y
prohojiy [21]
1946 times 3/100=58.38
58.38 times 5 =291.9

1946-291.9=165.41
165.41 is the answer. Please mark brainliest.
8 0
3 years ago
Solve for x<br> -12 = 4(x – 5)<br> X =
bonufazy [111]

Answer:

-12=4x-20

4x=12+20

4x=32

4 = 4

x=8

5 0
3 years ago
You know that the battery in your alarm clock is going to run out of power soon. If it runs out within the next 24 hours, what i
aivan3 [116]
The probability of an event is given by the number of favorable outcomes divided by the total number of outcomes. Here the event is the alarm clock running out of power. There are 24 hours during which the power can go out. You are asleep during 8 of these. A "favorable" outcome in this case is the power going out while you are sleeping -- that is, during one of those 8 hours. This makes the probability that the power goes out while you are sleeping 8/24.
3 0
3 years ago
If a parabola’s focus is at (1,1) and directrix is at y = 7, what is the standard form of the equation representing this parabol
inysia [295]
<span>y=1/12(x-1)2<span>+4

attached is a file/ picture i made in google images of a graph of it, i explain the steps as well.
id appreciate a brainliest since the drawing took a good 15 minutes but its up to you! Hope i helped.</span></span>

4 0
4 years ago
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