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kipiarov [429]
4 years ago
6

What is y in " -9/2y = 27/2 " ?

Mathematics
2 answers:
AysviL [449]4 years ago
8 0
To find out what y equals, get y alone on one side. To do this, first, multiply each side by 2. This will get rid of the fractions on both sides.

2(-9/2y)=2(27/2)
-9y=27

Finally, divide each side by -9 to get y alone

-9y=27
----- -----
-9 -9

y=-3
Nana76 [90]4 years ago
4 0
-\frac{9}{2}y=\frac{27}{2}
⇒-9y=27
⇒y=-3
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Decide which of the two points lies on the graph of the line<br>2x+y=10​
Dmitrij [34]

Answer:

x =2.5 and y = 5, that should work

8 0
3 years ago
A building company employs 3 labourers 12 joiners 8 electrician 4 plumbers. For a job, the company needs one of each type of wor
Novay_Z [31]

The number of ways that the company can choose four workers is 40920 ways.

<h3>How to calculate the number?</h3>

From the information, the building company employs 3 laborers 12 joiners 8 electrician 4 plumbers. The total number of workers will be:

= 3 + 12 + 8 + 4

= 27 workers

It should be noted that combination will be used to choose the 4 workers. This is illustrated as

Combination formula

ⁿCr = n! / ((n – r)! r!)

n = the number of items.

r = how many items are taken at a time.

where n = 33

r = 4

ⁿCr = n! / ((n – r)! r!)

³³C₄ = 33! / (33 - 4)! 4!

= 33! / 29! 4!

= 33 × 32 × 31 × 30 / 4 × 3 × 2

= 40920 ways

Learn more about combinations on:

brainly.com/question/4658834

#SPJ1

7 0
2 years ago
What is the value of a in the equation 5 a minus 10 b equals 45, when b equals 3?
PilotLPTM [1.2K]

Answer:

15

Step-by-step explanation:

5a - 10b = 45

5a - (10×3) = 45

5a - 30 = 45

5a = 45 + 30

5a = 75

a = 15

3 0
3 years ago
Solve the right triangle given that mZA= 30°, mZC = 90°, anda = 15. Round your result to one decimal place.​
Genrish500 [490]

Answer:

\angle B  = 60^o

b =17.3

c = 20

Step-by-step explanation:

Given

a= 15

\angle A = 30^o

\angle C = 90^o

<em>See attachment for illustration</em>

Required

Solve the triangle

First, we calculate the measure of B

\angle A + \angle B + \angle C = 180^o --- angles in a triangle

30^o + \angle B + 90^o = 180^o

Collect like terms

\angle B  = 180^o-90^o-30^o

\angle B  = 60^o

Solve for (c) using sine function

\sin(30) = \frac{a}{c}

Make c the subject

c = \frac{a}{\sin(30)}

Substitute known values

c = \frac{10}{0.5}

c = 20

Solve for (b) using Pythagoras

c^2 = a^2 + b^2

This gives:

20^2 = 10^2 + b^2

400 = 100 + b^2

Collect like terms

b^2 =400 - 100

b^2 =300

Take square roots

b =17.3

8 0
3 years ago
(7h + 7) + (7h + 8)<br><br> ........
galben [10]

Answer:

14h+15

Step-by-step explanation:

(7h + 7) + (7h + 8)

First simplify

Eliminate redundant parentheses

(7h+7)

7h+7+7h+8

Add the numbers

7h+(7)+7h+(8) .      7+8=15

7h+15+7h

Combine like terms

(7h)+15+(7h)         (7h)+(7h)=14h

14h+15

The answer would be 14h+15

3 0
3 years ago
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