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Nat2105 [25]
3 years ago
15

Julio gets paid $10.00 an hour to babysit his cousins 4 hours a week. He allows himself to spend $7.00 a week and he saves the r

est. How much will he have saved in 5 weeks?
Mathematics
1 answer:
IRINA_888 [86]3 years ago
4 0
$165.00

$10*4= $40

$40 x 5 = $200
$200- (5 x $7)
$200-35
$165
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Two cars left the city for a suburb, 120 km away, at the same time. The speed of one of the cars was 20 km/hour greater than the
Virty [35]

Answer:

V1 = 60 km/h

V2 = 40 Km/h

Step-by-step explanation:

The speed of an object is defined as

Speed =  distance / time

Let

V1 be the speed of the faster car

V2 be the speed of the other car

t1 the time it took for the first car to arrive

t2 the time it took for the second car to arrive

d1 the distance traveled by first car

d2 the distance traveled by second car

We know thanks to the problem that

V1 = V2 + 20 Km/h

t1 = t2 - 1 hour

d1 = d2 = 120 Km

d1 = V1 * t1

d2 = V2* t2

V1 * t1 = V2* t2

V1* t1 = (V1 -20)*(t1 +1)

The system of equations

(V1 -20)*(t1 +1) = 120

V1 * t1 = 120

120 + (120/t1) -20*t1 = 140

(120/t1) -20*t1  = 20

Which gives,

t1 = 2

This means

V1 = 60 km/h

V2 = V1 - 20 Km/h =  40 Km/h

6 0
2 years ago
Multiply 6/5 by the reciprocal of (-3/8)
weeeeeb [17]

Answer:

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Step-by-step explanation:

The reciprocal of -3/8 is -8/3. So the equation will be 6/5 x -8/3. Multiply numerators then multiply denominators to get -48/15. This can simplify to -16/5 by dividing both by 3.

4 0
3 years ago
Read 2 more answers
Can someone help ^^; im not good with math
ivanzaharov [21]
It’s 7 in that’s the only answer that makes sense
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What does x equal and what does y equal? Thank you. (Answer and explanation please.)
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Answer:

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3 years ago
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LenaWriter [7]

Answer:

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Step-by-step explanation:

6 0
2 years ago
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