All categories

3 years ago

Solve the following equation for y: -4x+8y=24

Mathematics

1 answer:

Alecsey [184]3 years ago

4 0

Answer: y = 3 + x/2

Step-by-step explanation:

You might be interested in

Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second mechanic worked for 5 hours. Together they

nignag [31]

Answer:

Step-by-step explanation:

Let a represent the charges made hourly by Mechanic 1 and b represent that of Mechanic 2;

a + b = 165, a = 165 - b

10a + 5b = 1200

substitute the value of a in the second equation;

10(165 - b) + 5b = 1200

1650 - 10b +5b = 1200

1650 - 5b = 1200

-5b = 1200 - 1650

-5b = -450

b = 450/5

b = $90/hr

If mechanic 2 charged $90/hr,

a + 90 = 165

a = 165 - 90

a = $75/hr being the hourly rate charged by mechanic 1.

4 0

4 years ago

!!Given m|n, find the value of x.<br> (4x-7)<br> (3x+9)

UkoKoshka [18]

Answer:

4 x − 7 is the exact value

Step-by-step explanation:

5 0

3 years ago

A baseball team won 20 games and lost 10 games. What percent of the games did the team win?

omeli [17]

50% of the games were won

5 0

4 years ago

Is this fraction irrational or rational?<br> 9.68 (the eight is repeating)

LenaWriter [7]

Answer:

Hello Mate! Ans : Yes, number x = 9.688888...... is rational number.

3 0

3 years ago

The amount of time all students in a very large undergraduate statistics course take to complete an examination is distributed c

Anestetic [448]

Answer:

a) The mean is $\mu = 60$

b) The standard deviation is $\sigma = 9$

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

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.

The probability a student selected at random takes at least 55.50 minutes to complete the examination equals 0.6915.

This means that when X = 55.5, Z has a pvalue of 1 - 0.6915 = 0.3085. This means that when $X = 55.5, Z = -0.5$