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AURORKA [14]
3 years ago
11

3x+3y=10 -9x-9y=-30

Mathematics
1 answer:
Schach [20]3 years ago
4 0
There is no solution for this answer

solve problems by elimination
eqn1) 3x+3y=10
eqn2) -9x-9y=-30


1st multiply eqn 1 by 3
= 9x+9y=30

now add the 2 equations
eqn1) 9x+9y=30
eqn2) -9x-9y=-30

x term: eqn1+eqn2 = (9x-9x) =0x

y term: eqn1+eqn2 = (9y-9y) =0y

coefficient term: 30-30=0

new eqn = 0x +0y = 0

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He would need to sell 28 because 
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4 0
3 years ago
18. Doreen picked 2.33 kg of grapes. She gave 800 g of the grapes to her brother and then shared the remaining grapes equally wi
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---------------------------------------︵‿︵‿୨♡୧‿︵‿︵--------------------------------------

Answer:

765 grams

Step-by-step explanation:

Exchange:

2.33 kg = 2330 gr

Grams of grapes that are left after giving 800 grams to her brother:

2330 - 800 = 1530 gr

Grams of grapes each sister will get if Doreen shares the remaining equally:

1530 : 2 = 765 gr

--------------------°✧° Pls mark me as °♡°(ꂧ ꁞ ꂧ)°♡° Brainliest °✧°--------------------

3 0
2 years ago
Read 2 more answers
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Answer:

4

Step-by-step explanation:

5 0
3 years ago
Please help guys need help
dmitriy555 [2]

Answer:

A) slope = 20.

B)  The slope of 20 dollars per hour means that for every hour, the price of the service call increases by 20 dollars (or you could say the price of the service call is 20 dollars every hour, both work.)

Step-by-step explanation:

Recall that slope is y2 - y1 / x2 - x1.

Excellent. We are provided with two points: (1, 60) and (3, 100). Let’s enter this into our formula.

Slope = (100 - 60) / (3 - 1) = 40 / 2 = 20.

Now, to determine what the slope means, we can look at the axis titles on the graph. The x axis title is hours, or time in hours. The y axis title is price of the service call in dollars. Therefore, the slope is price (in dollars) per time (in hours).

This can be restated as: The slope of 20 dollars per hour means that for every hour, the price of the service call increases by 20 dollars (or you could say the price of the service call is 20 dollars every hour, both work.)

Hope this helps!

7 0
3 years ago
Let f(x) = 9 – x^2, g(x) = 3 – x. Find (f – g)(x) and its domain.
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6 0
3 years ago
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