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zalisa [80]
3 years ago
15

Stan worked 4 years less than Marco.This year Stan has worked 29 years.If b is how long Marco worked, the equation b - 4 = 29 re

spresents this situation.How can you get the variable alone on one side of the equation?
Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
6 0

Answer:

Add 4 on both sides.

In the equation there is a -4.

If -4+4=0, that is how you would get rid of the -4.

But, you need to add 4 to 29 to really get rid of the -4.

So, 29+4 is 33.

b=33

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Bill has saved $825 from his last 8 paychecks. He saved either $75 or $150 a paycheck. Formulate and solve a system of equations
11Alexandr11 [23.1K]

Answer: 5 times

Step-by-step explanation:

Let the number of times that he saved $75 be x.

Let the number of times that he saved $150 be y.

Therefore, based on the information given in the question, we can form an equation which will be:

x + y = 8 ...... i

75x + 150y = 825 ....... ii

From equation I,

x + y = 8

y = 8 - x....... iiii

Put equation iii into ii and this will be:

75x + 150y = 825

75x + 150(8 - x) = 825

75x + 1200 - 150x = 825

75x - 150x = 825 - 1200

-75x = -375

x = 375/75

x = 5

He saved $75 5times from his paycheck.

4 0
3 years ago
Fifteen more than half a number is 9.
7nadin3 [17]

Answer:

-12

Step-by-step explanation:

-12/2 = -6

-6+15 = 9

4 0
3 years ago
Read 2 more answers
Calculate the radicand of f(x)=x^2+20x+97 and state what it tells you about the roots of the function. Then solve the function u
Furkat [3]

Answer: The roots are x=-10 +- root 3.

Step-by-step explanation:

7 0
2 years ago
You scored an 85 on a test. This corresponds to a z-score of 1.80. What percentage of the scores are better than yours?
Scrat [10]

At a z-score of 1.80, the percentage of the scores that are better than yours is equal to 3.59%.

<h3>What is a z-score?</h3>

In Mathematics, a z-score is sometimes referred to as a z-value or standard score and it can be defined as a measure of the distance between a raw score and the mean, when standard deviation units are used.

<h3>How to determine the percentage?</h3>

Mathematically, the z-score of a given sample score in a normal distribution can be calculated by using this formula:

Z-score = (x - μ)/σ

Where:

  • x represents the sample score.
  • σ represents the standard deviation.
  • μ represents the mean score.

Since a score of 85 on a test corresponds to a z-score of 1.80, the percentage of the scores that are better than yours is given by:

P(x > 85) = P(z > 1.80)

P(z > 1.80) = 0.0359

P(z > 1.80) = 3.59%.

Read more on z-scores here: brainly.com/question/26714379

#SPJ1

5 0
1 year ago
Mr. Lewis’s paycheck is $506.14.
AnnZ [28]

Answer:

457.45

Step-by-step explanation:

Calculators are magic.. but seriously its hard to explain if you match up your dots (.) you just simply subtract 48.69

4 0
2 years ago
Read 2 more answers
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