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Dmitry_Shevchenko [17]
3 years ago
10

Mallory makes $10 per hour babysitting and $8 per hour working at the local grocery store. Last week she babysat for 6 hours. He

r total gross earnings for both jobs was $180. How many hours did she work at the grocery store?
Mathematics
2 answers:
miv72 [106K]3 years ago
6 0
Mallory would have worked for 15 hours
abruzzese [7]3 years ago
6 0
10(6)+8x=180
60+8x=180
8x=120
x=15
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Plz help
mixas84 [53]

x2y + z = 9 \\  \\ 1. \: x + 2y + z +  - 2y = 9 +  - 2y \\ x + z =  - 2y + 9 \\ 2. \: x + z +  - z =  - 2y + 9 +  - z \\ x =  - 2y - z + 9 \\  \\  \\ x + y - z = 5 \\  \\ 1. \: x + y - z +  - y = 5 +  - y \\ x - z =  - y + 5 \\ 2. \: x - z + z =  - y + 5 + z \\ x =  - y + z + 5 \\  \\  \\ 3x - y + 2z = 12 \\ 1. \: 3x - y + 2z + y = 12 + y \\ 3x + 2z = y + 12 \\ 2. \: 3x = y - 2z + 12 \\ 3. \:  \frac{3x}{3}  =  \frac{y - 2z + 12}{3}  \\ x =  \frac{1}{3} y +  \frac{ - 2}{3} z + 4

7 0
2 years ago
One month bob rented 5 movies and 2 video games for a total of $26 . the next month he rented 3 movies and 8 video games for a t
dezoksy [38]
Let x be the number of movies rented 
Let y be the number of video games rented 

(5x+2y=26)4
- 3x+8y=53 

 20x+8y=104 
-3x+8y=53
-----------------
17x       =51 
x=51/17 
x=3 

5x+2y=26 
5(3)+2y=26 
2y=26-15 
y=11/2 
y=5.5 

Therefore, the movies cost $3 and the video games cost $5.5 

Hope I helped :)
4 0
3 years ago
I would like some help wit this problem also if you don’t mind
Georgia [21]

A rectangle is a parallelogram, so its opposite sides are equal. The diagonals of a rectangle are equal and bisect each other.

5 0
2 years ago
Read 2 more answers
40% of the students passed both exams. 80% of the students passed the second exam. how many students (in percent) who passed the
navik [9.2K]

50%. students (in percent) who passed the second exam also passed the first exam.

Let's imagine that there are 100 kids in the teacher's class. We know that 40 of them passed BOTH tests, and 80 passed the second test.

Because if they weren't, they wouldn't have passed the first test and consequently wouldn't have passed both, we can be sure that the group of students who passed BOTH tests is only made up of the 80 who passed the second test.

Thus, both tests were passed by 40 of the 80 pupils who passed the second one:                                      

40/80 = 1/2 = 50%.

Find out more on Percentage at:

brainly.com/question/24877689

#SPJ4

7 0
11 months ago
who would win? Justice leage or the Teen titans, the Thundercats and the Teenage mutant ninja turtles
Marat540 [252]
Justice league by murder
3 0
3 years ago
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