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2 years ago

Solve the following system using elimination 2 x − 3 y = −2 9 x − 10 y = 12

Mathematics

1 answer:

Nina [5.8K]2 years ago

7 0

Answer:

x-y=-6

Step-by-step explanation:

hope this helps and I hope you have a good day

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Help please i'll give u brainliest

TiliK225 [7]

Answer:

Degree: 5

Leading Coefficient: -7

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

If Jasper installs a floor himself, it will take him 7 hours. Working with Yolanda, it will take them 3 hours.

Svetllana [295]

Answer: 5 $\frac{1}{4}$ hrs

<u>Explanation:</u>

Jasper: $\frac{1}{7}$ per hr

Yolanda: $\frac{1}{x}$ per hr

Together: $\frac{1}{3}$ per hr

Jasper + Yolanda = Together

$\frac{1}{7}$ + $\frac{1}{x}$ = $\frac{1}{3}$

$(21x)\frac{1}{7}$ + $(21x)\frac{1}{x}$ = $(21x)\frac{1}{3}$

3x + 21 = 7x

21 = 4x

$\frac{21}{4}$ = x

$5\frac{1}{4}$

7 0

2 years ago

Read 2 more answers

Bill and Joe leave their house at the same time heading in opposite directions. If Bill is driving three times faster than Joe a

Arisa [49]

The problem statement gives you the relationship between their speeds, and it gives you information you can use to find their total speed. You solve this by finding the total speed, then the proportion of that belonging to Bill.

The total speed is (120 mi)/(3 h) = 40 mi/h.

The speed ratio is ...

... Bill : Joe = 3 : 1

so the speed ratio Bill : Total is ...

... 3 : (3+1) = 3:4.

Bill's speed is (3/4)×(40 mi/h) = 30 mi/h.

4 0

3 years ago

Maggie earns money from working at the pet store and answering phones. She earns $10 each hour she works at the pet store and $0

kvv77 [185]

115 = 10X + 0.25(60)

115 = 10x +15 (this is the equation to use)

100=10x

x=10 hours

4 0

2 years ago

Amanda spent a total of 70 minutes competing her chores this week. Write and solve an equation to represent the number of minute

gtnhenbr [62]

Answer:

28 minutes spent in washing the dishes.

Step-by-step explanation:

Given the table

Chore time in minutes

Sweeping 42

Dishes ?

Amanda spent a total of 70 minutes competing her chores this week

Total of 70 minutes spent

42 minutes spent in sweeping . to find the number of minutes Amanda spent in washing the dishes , subtract 42 minutes from the total time spent

let x be the number of minutes spent washing the dishes

$42+x=70$

To solve for x , subtract 42 from both sides

$42+x=70\\x= 70-42\\x=28$

28 minutes spent in washing the dishes.

4 0

3 years ago