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Leviafan [203]
3 years ago
13

Solve the system below algebraically: 4x-y=20 -2x-2y=10

Mathematics
1 answer:
viva [34]3 years ago
6 0
X= 3
Y= -8

Solve the 1st equation for y.
With your new Y value, plug it into the 2nd equation (for y).

Take a look at pic.
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stiks02 [169]

Answer:

its D

Step-by-step explanation:

6 0
3 years ago
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It is recommended that an adult drink 64 fluid ounces of water everyday Josie has already consumed 700 mL of water how many more
katen-ka-za [31]

Answer:

1.2 litres  more water should Josie drink.

Step-by-step explanation:

As given

It is recommended that an adult drink 64 fluid ounces of water everyday .

As given

1 ounce = 0.0296 litre .

Now convert 64 ounces into litre.

64 ounce = 64 × 0.0296

                = 1.9 litres (Approx)

As

1 litre = 1000 ml

1\ ml= \frac{1}{1000}\ litre

Now convert 700 ml into litre.

700\ ml= \frac{700}{1000}\ litre

700\ ml= \frac{7}{10}\ litre

700 ml = 0 .7 litre

Thus

Recommended amount of water a adult should drink = Amount of water Josie already consumed + More water should Josie drink.

Putting the value

1.9 litres = 0 .7 litres +  More water should Josie drink.

More water should Josie drink = 1.9 - 0.7

More water should Josie drink = 1.2 litres .

Therefore 1.2 litres  more water should Josie drink.




8 0
3 years ago
Rewrite as a mathematical equation and solve: 3 less than the product of 5 and a number is 42. Find the number.
Temka [501]

5x-3=42. To solve you add three to both sides making the equation 5x=45. Then you divide both sides by five, and you get 9 as your answer.

8 0
4 years ago
Find the following rates. Round your answer to the nearest hundredth. a. ? % of 75 = 5 b. ? % of 28 = 140 c. ? % of 100 = 40 d.
Nimfa-mama [501]
A.15 b.500 c.40 d.7.5 yeah, not to confident but I think it's correct.
5 0
3 years ago
Select the best possible first step to solving the system by first eliminating the x variable. 4x 9y = 21 3x − 8y = 1 multiply t
STatiana [176]
Multiply the first equation by 3, and multiply the second equation by 4.
3 0
3 years ago
Read 2 more answers
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