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Vlad [161]
3 years ago
10

Solution of the equation 3x/5+1 = 4x/15+7

Mathematics
1 answer:
Inessa05 [86]3 years ago
6 0

Answer:

x=18

Step-by-step explanation:

\frac{3x}{5} +1=\frac{4x}{15} +7

\frac{3x}{5} -\frac{4x}{15} =7-1

\frac{9x}{15} -\frac{4x}{15} =6

5x/15=6

5x=90

x=18

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For a 2 week period Jan earned $150 less than twice toms earnings together Jen and tom earned 1380$ how much did tom earn?
nika2105 [10]
Given:
Tom's earnings: x
Jan's earnings: 2x - 150
Total earnings: 1380

x + 2x - 150 = 1380
3x = 1380 + 150
3x = 1530
3x/3 = 1530/3
x = 510

Tom's earnings: x = 510
Jan's earnings: 2x - 150 = 2(510) - 150 = 1,020 - 150 = 870
total earnings: 1,380

510 + 870 = 1,380
1,380 = 1,380
6 0
3 years ago
What is the distance formula and how do i do it
stiv31 [10]

Answer: What is the distance formula is that it's the formula used in Mathematics such as Pre-Algebra, Algebra 1, Geometry, Algebra 2, Trigonometry, and Pre-Calculus, also Calculus to help you find the distance between 2 points in a coordinate plane or the length of a segment. How you do the distance formula is you subtract the 2nd x coordinate by the 1st one, next you add the 2nd y coordinate to the 1st one, then the answer you get you evaluate them using the exponent of 2, lastly you add that answer and square root the answer you get to the approximate or closest decimal or whole number.

7 0
3 years ago
You deposit $3000 into an account that pays 4.8% interest, compounded monthly. A) What is the value of the account after 5 years
Snezhnost [94]

Answer:

14.4 years (about 14 years 6 months)

Step-by-step explanation:

Given data

Principal= $3000

Rate= 4.8%

A. Time= 5 years

The expression for compound interest is

A=P(1+r)^t

Substitute

A= 3000(1+0.048)^5

A= 3000(1.048)^5

A=3000*1.264

A=$3792

Hence the balance will be $3792

B. Final Amount A = $6000

The expression to find time is given ast

t= ln(A/P) / r

substitute

t= ln(6000/3000)/0.048

t= ln2/0.048

t= 0.6931/0.048

t=14.43

Hence the time is 14.4 years (about 14 years 6 months)approx

8 0
3 years ago
412 students were surveyed about their preferences of sports. 115 students like football, 100 students like baseball, and 45 stu
Damm [24]

Answer: 242 students do not like football or baseball

Step-by-step explanation:

The total number of students that were surveyed about their preferences of sports is 412. The Venn diagram is shown in the attached photo.

If 45 students like both sports, then the number of students that like football only would be

115 - 45 = 70

Also, the number of students that like baseball only would be

100 - 45 = 55

The number if students that like at least one of the sports is

70 + 55 + 45 = 170

Therefore, the number of students that do not like football or baseball would be

412 - 170 = 242

3 0
4 years ago
Solve to find the value of x.
Marianna [84]

Answer:

x = 22

Step-by-step explanation:

triangle = 180 degrees

2x + 12 + x + 54 + 3x - 18 = 180 degrees

combine like terms

6x + 12 + 54 - 18 = 180

6x + 48 = 180

<u>       -48     -48</u>

6x = 132

divide by 6

x = 22

<em><u>Hope this helped! Have a nice rest of ur day! Plz mark as brainliest!!!</u></em>

<em><u>-Lil G</u></em>

7 0
4 years ago
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