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Masteriza [31]
3 years ago
14

Question 14

Mathematics
1 answer:
Delicious77 [7]3 years ago
8 0

Answer:

A (5,6)

Step-by-step explanation:

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I really need help. Solving Systems with Substitution<br><br> y=2x<br> x+y=(-9)
Viktor [21]

Answer:

Step-by-step explanation:

If you let y=2x, you can plug it into the other equation.

x+2x=-9

Then solve that equation.

3x=-9

x=-3

Then use y=2x to find y.

y=2(-3)=-6

y=-6

6 0
4 years ago
ten years ago, the ratio of two brothers was 1:4. fourteen years from now, the ratio will be 4:7. What is the ratio of their pre
andrey2020 [161]

The ratio of their age is 3:7.

Step-by-step explanation:

Given,

10 years ago, the ratio of two brothers was 1:4

After 14 years the ratio will be 4:7

To find the ratio of their present age.

Let,

10 years age their age was x and 4x

So, now their age is (x+10) and (4x+10)

14 years from now their age will be (x+10+14) and (4x+10+14)

That is x+24 and 4x+24

According to the problem,

x+24 : 4x+24 = 4:7

or, \frac{x+24}{4x+24} = \frac{4}{7}

or, 7(x+24) = 4(4x+24)

or, 7x+168 = 16x+ 96

or, 16x-7x = 168-96

or, 9x = 72

or, x = 8

Hence,

Their present age is (8+10) and (4×8+10) = 18 and 42

Hence,

The ratio of their age is 18:42 = 3:7

3 0
3 years ago
The total cost to rent a row boat is 16 times the number of hours the boat is used. How long can you rent the boat for 224.
likoan [24]

divide 224 by 16

224 / 16 = 14 hours

5 0
3 years ago
3.495 in a fraction in simplest forms
avanturin [10]
3.495 is written in fraction as 395/100 and in simplest form as 79/20 and in mixed fraction as (3)19/30

P.S: it is 3 whole

hope this helps :)
8 0
3 years ago
2(3x+10)=6x+20 does this equation have one solution or many ? Explain why
mylen [45]

Answer:

2(3x+10) = 6x+20

6x+20 = 6x+20

6x = 6x

x = x

This has an infinite amount of solutions

Step-by-step explanation:

8 0
3 years ago
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