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2 years ago

Solve the linear equation 2.25 – 11j – 7.75 1.5j = 0.5j – 1

2 answers:

8 0

First you will want all the j variables on one side, and you'll want to simplify it. Additionally, I like to change subtraction to addition of the opposite.

2.25 + (-11j) + (-7.75) + 1.5j = 0.5j + (-1)
-5.5 + (-9.5 j) = 0.5j + (-1)
-5.5 + (-9.5j) + (-0.5j) = -1
-5.5 + (-10j) = -1
-5.5 + 5.5 + (-10j) = -1 + 5.5
-10j = 4.5
-10j/-10 = 4.5/10
j = -0.45 assuming that 7.75 was added to 1.5 j

Gwar [14]2 years ago

4 0

we have

$2.25 - 11j - 7.75+ 1.5j = 0.5j - 1$

<u>Solve for j</u>

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$2.25 - 11j - 7.75+ 1.5j = 0.5j - 1\\ 11j+0.5j-1.5j=2.25-7.75+1\\ 10j=- 4.5\\\\ j= -\frac{4.5}{10} \\ \\ j=-0.45$

therefore

<u>the answer is</u>

$j=-0.45$

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2 years ago

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Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. David has a score of 52 on Ms. Bond's test. Scores o

otez555 [7]

Answer:

Due to the higher z-score, David has the higher standardized score

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The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

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Whoever had the higher z-score.

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2 years ago

Six pairs of socks cost as much as 1 coat, 2 pairs of jeans cost as much as 3 pairs of shoes, and 4 pairs of socks cost as much

REY [17]

(1) 6 pairs of socks = 1 coat
(2) 2 pairs of jeans = 3 pairs of shoes
(3) 4 pairs of socks = 1 pair of jeans

the last two points are irrelevant becuase we just need socks and coats.
6 pairs of socks are equal to 1 coat.
we need 64 pairs of socks.
so, 64 ÷ 6 = 10.67

so we'll need 10.67 coats for 64 pairs of socks.

i'm not sure if you've typed up the correct numbers becuase i don't think the answer would be expressed as a decimal.

unless we say that we need 11 pairs of coats?

perhaps reread the question again and make sure you've typed it up correctly
xD i hope i've helped.

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