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3 years ago

If angle a has a measurement of 42 degrees and is complentary to angle b , what's the measure of angle b ?

Mathematics

1 answer:

USPshnik [31]3 years ago

5 0

B is 90-42=48° since complementary angles add to 90°

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Solve the equation<br>2/3 h - 1/3 h + 11 = 8<br><br>h = ?

Deffense [45]

Answer:

$2 \div 3h - 1 \div 3 h+ 11 = 8 \\ 2 - 1 \div 3h = - 3 \\ 1 \div 3h = - 3 \\ - 9h = 1 \\ h = - 1 \div 9$

-1/9 is the answer

8 0

3 years ago

What is the percent of decrease from 100 to 38?

Ipatiy [6.2K]

Answer: 62

Step-by-step explanation:

100 - x = 38

x =62

7 0

2 years ago

Given f(x)=-3x+4 , what is f(2) ?

user100 [1]

F(X) means plug in te number within the parenthesis for the given function. It's simply an equation expressed through different notation. In this case it asks you to plug in two, so you do:
-3(2)+4 = f(2)
That means that f(2)=-2.

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3 years ago

*click photo*

kkurt [141]

Answer:

I believe the answer is y=x + 5

3 0

3 years ago

Read 2 more answers

The mean of a list of test scores is 80. Adding an additional test score of 92 caused the mean to rise to 82. After this additio

miv72 [106K]

Answer:

Step-by-step explanation:

The mean of a list of test scores is 80

Adding an additional test score of 92 caused the mean to rise to 82

To find:

After this additional, how many total test are in the list ?

Solution:

Let the total number of test at first = $n$

And sum of total score = $S$

As we know, mean = $\frac{sum \ of \ total \ observation}{number\ of \ total\ observation}$

$80= \frac{S}{n} \\$

Multiplying both sides by $n$

$80n=S$

Now, as adding an additional test score of 92 caused the mean to rise to 82,

$S+92=82\times(n+1)\\80n +92 = 82n+82 \ (given \ S =80n)$

$80n-82n =82-92\\-2n=-10$

By dividing both sides by minus ( - )

$2n =10$

By dividing both sides by 2

$n =5$

Thus, total number of test at first = $n$ = 5

And, after this additional score added, total number of tests are $n+1=6$

4 0

3 years ago