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3 years ago

What is the value of a in the equation 3a + b = 54, when b = 9?

1 answer:

4 0

In order to do this you have to substitute b with 9 and get 3a+9=54, now subtract 9 from both sides to leave a by itself and get 3a=45, now divide 3 in both sides to leave a by itself and get a=15

Hope this helps

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What does 3y-y equal?

Novosadov [1.4K]

Answer:

$2y$

Step-by-step explanation:

You need to subtract the coefficients to get the answer.

Let's look at the equation...

$3y-y$

The coefficient is 3 and 1

So, you do 3-1

You get 2

So...

$3y-y=2y$

4 0

3 years ago

250 employees in an organization were surveyed about their hair color and height the data collected is presented in the table if

Likurg_2 [28]

1) There are 90 + 74 people who are "at least 175 cm tall" (164 ppl)

2) probability is 164/250 = 0.656

D. 0.656

4 0

1 year ago

Problem

Stels [109]

Answer:

The maximum speed of Hal's airplane in still air is:

$v= 250\ miles/h$

The speed of the wind

$c = 50\ miles/h$

Step-by-step explanation:

Remember that the velocity v equals the distance d between time t.

$v=\frac{d}{t}$ and $t*v=d$

The distance that Hal travels when traveling with the wind is:

$(2\ hours)(v + c) = 600$ miles

Where v is the speed of Hal and c is the wind speed.

The distance when traveling against the wind is:

$(3\ hours)(v-c) = 600$ miles

Now we solve the first equation for v

$(2)(v + c) = 600$

$2v + 2c = 600$

$2v= 600-2c$

$v= 300-c$

Now we substitute the value of v in the second equation and solve for c

$3((300-c)-c) = 600$

$3(300-2c) = 600$

$900-6c = 600$

$-6c = 600-900$

$-6c = -300$

$6c = 300$

$c = 50\ miles/h$

Then:

$v= 300-(50)$

$v= 250\ miles/h$

The maximum speed of Hal's airplane in still air is:

$v= 250\ miles/h$

The speed of the wind

$c = 50\ miles/h$

7 0

2 years ago

NEED HELP ASAP BRAINLIEST ANSWER IF CORRECT

Alex_Xolod [135]

If we need sections that are 18 ft. long from available 78 ft. long line than we will divide 78/18 =4.(3)
So we will get 4 sections that are 18 ft. long and we will have a remainder of 6 ft line not used.

4 0

2 years ago

Rand has 10 points. Randy has 8 points. how many more does Rand have than Randy?

Harlamova29_29 [7]

Answer:

2 more than Randy.

Step-by-step explanation:

You need to subtract to get your answer so you subtract 10 and 8 giving you your answer of 2 more points.

3 0

3 years ago

Read 2 more answers