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UNO [17]
2 years ago
14

Solve the system of equations using substitution. Y= 2x - 10 Y= 4x - 8

Mathematics
1 answer:
Oksana_A [137]2 years ago
8 0

Answer:

Step-by-step explanation:

4x - 8 = 2x - 10

2x - 8 = -10

2x = -2

x = -1

y = 4(-1) - 8 = -4 -8 = -12

(-1, -12)

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arlik [135]
Answer choice D. In order to find the r value, you need to find the degrees of freedom (df). df = n -2. In this case then the degrees of freedom is 9 (11 - 2). Now you use the df, the significance value (also known as p-value), and the critical value table (search it up if you don’t have one) to find that with a df of 9 and a probability value of 0.01, the r = 0.735.

The reason for why the answer is not “A” is due to the fact that we’re finding all of the possible r values, we are not a evaluating r to see whether or not it is significant.
4 0
2 years ago
What is the simplified form of the following expression? 6c^2 + 2.5d - d + 2c^2 - 3d
motikmotik

<u><em>Answer:</em></u>

<u>The simplest form would be:</u>

8c² - 1.5d


<u><em>Explanation:</em></u>

To simplify an expression, we need to <u>gather the like terms</u>.

Like terms are the ones having the same variable raised to the same power


<u>In the given expression:</u>

6c² + 2.5d - d + 2c² - 3d


We have terms having c² and terms having d.

<u>Therefore, we would gather them as follows:</u>

6c² + 2.5d - d + 2c² - 3d

(6+2)c² + (2.5-1-3)d

8c² - 1.5d ......................> This is the simplest form


Hope this helps :)

6 0
4 years ago
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945 divided by 35 with remainders
asambeis [7]

Answer:

27.

Step-by-step explanation:

945 / 35 = 27. There are no remainders... Although you could potentially say that 0 is the remainder.

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3 years ago
George Orwell was visiting London and left his hotel at 8:00 am and returned at 9:00 pm. That day, he was recorded 286 times by
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Orwell, on average, was photographed 22 times every hour.
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Divide these fractions. -7/2 ÷ -4/9. The correct answer is reduced to its simplest form and expressed as a mixed number.
amm1812
        the answer is  7  1/8
3 0
3 years ago
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