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3 years ago

HELP ME WITH 18 just 18 THE BEST ANSWER GETS MARKED AS THE "BRAINLIEST"

Mathematics

1 answer:

ale4655 [162]3 years ago

4 0

It's 40 n 56 then 30 n 15 then 20 n 30

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What's the answer to these simple algebra questions.

Olegator [25]

Answer:

z = $\frac{979}{5}$ or z = 195.8

y=-30

a = 5

b = -7

x = 64

Step-by-step explanation:

5 0

3 years ago

What number 1,2,3? Im a lil confused:/

max2010maxim [7]

Undo the X first...........

5 0

2 years ago

X-2y=18 2x+y=6 parallel perpendicular or neither

sergey [27]

<h3>Therefore they are perpendicular.</h3>

Step-by-step explanation:

A equation of line is

y =mx +c

Here the slope of the line is m.

Given equations are

x - 2y = 18

⇔-2y = -x +18

$\Leftrightarrow y =\frac{1}{2} x -9$ ............(1)

and 2x + y = 6

⇔y = -2x +6 ............(2)

Therefore the slope of equation (1) is $(m_1)$ = $\frac{1}{2}$

Therefore the slope of equation (2) is $(m_2)$ = -2

If two lines are perpendicular, when we multiply their slope we get -1.

therefore,

$m_1. m_2$ = $\frac{1}{2}$ . (-2) = -1

Therefore they are perpendicular.

4 0

3 years ago

A museum worker randomly displays 5 historical writings in a row. What is the probability that the worker lines them up from the

Mars2501 [29]

The number of ways to arrange the 5 writings in a row is 5! = 5 * 4 * 3 * 2 * 1 = 120 ways.

There is only 1 way to arrange the writings from oldest to newest.

Therefore, the probability is 1/120.

4 0

3 years ago

convert the mixed numbers to improper fractions. this will get you one step closer to finding the unit rate

Kaylis [27]

It means for example instead of writing 2 2/5 You would write 12/5
You can find out an improper fraction by simply multiplying the denominator by the front number and adding the answer to you numerator
So, 2x5= 10. 10+2= 12. So 12/5

8 0

3 years ago