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USPshnik [31]
3 years ago
10

1. - 2а - 9 = 6a + 15

Mathematics
2 answers:
Nataly_w [17]3 years ago
7 0

Answer:

-2a-6a=15+9

-8a=24

a=24/-8

a=-3

coldgirl [10]3 years ago
3 0

Answer:

a=-3

Step-by-step explanation:

-2a-6a=15+9

-8a=24

a=-3

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Sam is hired for a 20-day period. On days that he works, he earns $60. For each day that he does not work, $30 is subtracted fro
Alenkinab [10]

Answer:

He did not work for 6 days

Step-by-step explanation:

Sam is hired for a 20-day period.

Let x be the no. of days he did not work

So, No. of days he worked = 20-x

he earns per working day = $60

So, he earns for (20-x) days = 60(20-x)

For each day that he does not work, $30 is subtracted from his earnings.

So, Amount deducted for x days = 30x

So, His earning for 20 days =60(20-x)-30x

We are given that At the end of the 20-day period, he received $660

So, 60(20-x)-30x=660

1200-60x-30x=660

1200-90x=660

1200-660=90x

540=90x

\frac{540}{90}=x

6=x

So, he did not work for 6 days

So, Option C is true

5 0
4 years ago
What is the percentage of 18.50?
Amiraneli [1.4K]

Answer:

18.5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
An angle, theta, is in standard position and its terminal side passes through the point (2,-1). Find the EXACT value of sin thet
Olenka [21]

Answer:

sinѲ = -1/√5 or -√5/5

Step-by-step explanation:

On the Cartesian plane, we have radius (r) and angle (Ѳ) theta.

On the Cartesian plane we also have x, y where:

x = r cosѲ .......Equation 1

and y = r sinѲ ........Equation 2

r = √x² + y²

In the question we are given points (2,-1)

Where x = 2 , y = -1

We would solve for r by substituting 2 for x and -1 for y

r = √ 2² + -1²

r = √ 4 + 1

r = √5

In the question, we were asked to find what sin theta (Ѳ) is. Hence, we would be substituting √5 for r in Equation 2

y = r sinѲ

Where y = -1 and r = √5

-1 = √5 sinѲ

Divide both sides by √5

sinѲ = -1/√5

We can also represent sin Ѳ in a proper form, by multiplying both top and bottom by √5

sinѲ = -√5/5

Therefore, sinѲ = -1/√5 of -√5/5

6 0
4 years ago
11x+5+-11x+29.........
Volgvan

You can add like terms. Like terms are terms that have the same variables and the same exponent.

11x + 5 + -11x + 29 =

= 11x + -11x + 5 + 29

= 34

Answer: 34

6 0
3 years ago
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The following transformation is an example of which of the following.
Scorpion4ik [409]

Answer:

Translation.

Step-by-step explanation:

5 0
3 years ago
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