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lora16 [44]
2 years ago
14

Solve the system of linear equations using linear combination.

Mathematics
2 answers:
lisov135 [29]2 years ago
8 0

Answer:

The answer is (1,7). Hope it helps

brilliants [131]2 years ago
6 0
3a + 6b = 45
2a - 2b = -12....multiply by 3
----------------
3a + 6b = 45
6a - 6b = - 36 ...(result of multiplying by 3)
---------------add
9a = 9
a = 1

3a + 6b = 45
3(1) + 6b = 45
3 + 6b = 45
6b = 45 - 3
6b = 42
b = 7

solution is : (1,7)
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joja [24]

1: True

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6 0
3 years ago
on day in the fall, mark raked the leaves on 5 peoples lawns in 2.5 hours. one day in the summer, he mowed 6 peoples lawns in 1.
GuDViN [60]
<h2><u><em>Ans</em></u>wer: </h2>

Assuming he works at a constant rate, the daily rate Mark rakes lawns in the fall is 40% of the daily rate he mows lawns in the summer.

<h2><u><em>Step-by-step explanation: </em></u></h2>

Fall:

5 neighbors' lawns / 2.5 hours = 2 lawns per hour

Summer:

6 neighbours' lawns / 1.2 hours = 5 lawns per hour

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8 0
3 years ago
Easiest way to calculate 22% mark up from a cost of say 39.99
satela [25.4K]

Answer:

The markup amount on the cost 39.99 $ will be: 8.78 $

Step-by-step explanation:

Given

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  • Mark up = 22%

As

22% = 0.22

The markup of 22% on the cost can be calculated by multiplying the cost by 22% or 0.22

so

Markup amount = 0.22 × 39.99

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Therefore, the markup amount on the cost 39.99 $ will be: 8.78 $

6 0
3 years ago
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swat32
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3 0
3 years ago
Haily paid $13 for 1 and 3/7 kf of sliced salami. What was the cost per kilogram of salami?
nikdorinn [45]

13 divided by 1 and 3/7=9 and 1/10

$9.10

4 0
3 years ago
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