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marusya05 [52]
3 years ago
13

What is the value of x 1/5×-2/3y=30 when y=15

Mathematics
1 answer:
Alinara [238K]3 years ago
3 0
Equation.
1/5 x - 2/3 y = 30

     y= 15

Substitution.
1/5 x - 2/3 (15) = 30

1/5 x - 10 = 30

1/5 x = 30 + 10

1/5 x = 40

   x = 200.
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2. Find the simple interest on a $2,350 principal deposited for 15 months at a rate of 3.77%
Katen [24]

To  solve for Simple interest, we use the formula:

I = Principal x Rate x Time(year)

where:

I = Simple interest = ?

Principal = $2,350

Rate = Rate on Interest = 3.77% = 0.0377

Time = 15 months, we have to convert 15months to year

12 months = 1 year

15 months = ?

Cross multiply

= 15 x 1/12

= 1.25 year

The Simple interest is calculated as:

$2350 x 0.0377 x 1.25

= $110.74375

Approximately = $110.74

Therefore, the simple interest on $2,350 is $110.74

To learn more, visit the link below:

brainly.com/question/19088526

3 0
3 years ago
9 boys can paint a basketball court in 3 hours how long should 5 boys take working at the same rate
vazorg [7]

Answer:

100 minutes

Step-by-step explanation:

3 hours= 180 min

180/9 = 20

20 x 5 =100 min

8 0
1 year ago
The sum of 40 consecutive integers is 100. what is the smallest of these 40 integers
k0ka [10]
Easy Way
100÷40=2.5 is exact middle of the integers so 20 integers are above 2.5 and 20 integers are below

22..21..20..19..18..17..16..15..14..13..12..11..10..9..8..7...6..5..4..3

2.5

2..1..0..-1..-2..-3..-4..-5..-6..-7..-8..-9..-10..-11..-12..-13..-14..-15..-16..-17..

This link will show you different equations
http://web2.0calc.com/questions/the-sum-of-40-consecutive-integers-is-100-what-is-the-smallest-of-these-40-integers
3 0
3 years ago
Express 5601 in scientific notation
Anna71 [15]
In scientific notation it is:5000+600+1
5 0
3 years ago
Please assist me with these problems​
Alex73 [517]

Answer:

1) $350

2) 55°

3) $300

Step-by-step explanation:

1) The total cost is the cost of the appointment plus the cost of the repair work.  The appointment costs $50.  The repair work costs $120 per 2 hours.  So the total cost is:

C = 50 + (120/2) t

C = 50 + 60t

For 5 hours of work, the cost is:

C = 50 + 60(5)

C = 350

It costs $350.

2) The temperature starts at 70°.  It drops 10° in 4 hours.  So the temperature after t hours is:

T = 70 + (-10/4) t

T = 70 − 2.5t

After 6 hours:

T = 70 − 2.5(6)

T = 55

The temperature is 55°.

3) Jennie's total pay is her weekly pay plus her commissions.  If her commission is x% of her sales, then her pay is:

P = 250 + (x/100) S

When her sales is $1000, her pay is $275.

275 = 250 + (x/100) 1000

275 = 250 + 10x

25 = 10x

x = 2.5

So her pay is:

P = 250 + (2.5/100) S

When S = $2000:

P = 250 + (2.5/100) 2000

P = 250 + 50

P = 300

Her total pay is $300.

8 0
3 years ago
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