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vazorg [7]
3 years ago
11

HURRRYYYY Evaluate the following expression: 7 + 3b + 4b use a=3 and b=5

Mathematics
2 answers:
marin [14]3 years ago
7 0

Answer:

222222222222224.705876

Elza [17]3 years ago
4 0

Answer:

42

Step-by-step explanation:

You would substitute B where is needs to go, 7 + 3(5) + 4(5). First multiply 3 x 5 to get 15, and then multiply 4 x 5 to get 20, 7 + 15 + 20. 7 + 15 = 22 + 20 = 42. I hope this helps.

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The ratio of boys to girls in a club is 4:3. If there are 48 boys, how many members of the club are there?
DochEvi [55]

Answer:

84

Step-by-step explanation:

Basically the ratio was multiplied by 12 to get the number of boys so you do the same to the other one.

6 0
3 years ago
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Each month for 7 months, Samuel mows 3 lawns . How many more lawns does he need to mow before he has mowed 29 lawns
Nimfa-mama [501]
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8 0
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If AED is dilated to points A, C, and B, which statement is true?
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3 years ago
Jeanie completed a 27 mile duathlon (a race that is a combination of running and biking) in exactly 2 hours. she ran an average
-Dominant- [34]
<span>Let x = the miles Jeanie ran y = the miles Jeanie biked T = 2 hours total time for the duathlon v1 = 8.5 mph Jeanie's running speed and v2 = 16 mph Jeanie's biking speed But T = Jean's time she ran t1 + time she biked t2 I. e t1 + t2 = 2 So we have average speed v2 when she biked = distance (y) / time (t2) Distance y = v2 * t2 = 16 * t2 and distance when she ran x = 8.5 * t1 Since she covered 27 miles while running and biking we have x + y = 27 8.5t1 + 16t2 =27 ------(1) t1 + t2 = 2 --------------(2) The simultaneous equation gives us t1 = 2/3 and t2 which is time she biked = 4/3 So 4/3 = 1 1/3. Which is 1 hour 20 minutes</span>
8 0
4 years ago
a student spends the same amount each week for bus fare. In 5 weeks, he spends $115. Write an equation for his relationship. Let
dem82 [27]

Answer:

f(x) = ($23/week)(x)

Step-by-step explanation:

Hello!

Let's determine the unit rate.  I'd suggest finding the cost per week, rather than the weeks covered by a certain amount of money.

Then:

$115

-------- = $23 per week

Then the amount spent as a function of the # of weeks would be:

f(x) = ($23/week)(x)

5 wk

4 0
3 years ago
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