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NNADVOKAT [17]
3 years ago
10

Another math question :)

Mathematics
2 answers:
mart [117]3 years ago
5 0

Lets x = Mary's age

Emily is there years older than twice her sister Mary's age = 2x + 3

Sum of both is less than 30:

x + 2x + 3 < 30

Solve for x

3x + 3 < 30

3x < 27

x < 9

Mary's age = 9

Inequality represents Mary's possible age:

0 < x < 9

Answer is the second one

0 < x < 9

Read more on Brainly.com - brainly.com/question/10770846#readmore

Travka [436]3 years ago
4 0

Lets x = Mary's age

Emily is there years older than twice her sister Mary's age = 2x + 3

Sum of both is less than 30:

x + 2x + 3 < 30

Solve for x

3x + 3 < 30

3x < 27

x < 9

Mary's age = 9

Inequality represents Mary's possible age:

0 < x < 9

Answer is the second one

0 < x < 9


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In chemistry class 18 liters of 30% alcohol solution must be mixed with 20% solution to get 14% solution how many liters of 20%
alexdok [17]
If you are mixing a 30% solution with a 20% solution to obtain a 14% solution, you will never obtain a 14% solution.

5 0
3 years ago
Find the measurement
Igoryamba

Answer:

RS = 2.4 cm

Step-by-step explanation:

given:

ST = 1.6cm

RT = 4 cm

RS + ST = RT

plugin values into the equation:

RS + 1.6 = 4

RS = 4 - 1.6

RS = 2.4 cm

3 0
3 years ago
Please do 17-24!!!! Thxs
Ludmilka [50]

Have you ever tried photomath?

8 0
3 years ago
The length of the rectangle is increased by 10%.
jonny [76]

Answer:

8% increase

Step-by-step explanation:

The length after the increase:

30 x 1.1 = 33cm

The width after the increase:

20 x 1.05 = 21cm

New perimeter:

2(33 + 21) = 108 cm^2

Old perimeter:

2(30 + 20) = 100 cm^2

Percentage increase of area:

108 / 100 = 1.08 = 8% increase

3 0
2 years ago
Read 2 more answers
Look at the photo for the question
vesna_86 [32]

Answer:

A: Y<1/2x+2

Step-by-step explanation:

The shaded area is under the line, which indicates that Y is less than or equal to. The +2 in the inequality tells you where the y-intercept is (where the line goes through the y-axis). The 1/2 in the inequality tells the slope of the line (up 1, over 2) thus 1/2. So the answer is A

8 0
3 years ago
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