2 years ago

HELP PLEASE FAST. 30 POINTS.

Mathematics

1 answer:

QveST [7]2 years ago

3 0

Answer:

The age of the oldest child id 7.

Step-by-step explanation:

There are 5 children:

1st Child: 7 Years Old

2nd Child: 6 Years Old

3rd Child: 5 Years Old

4th Child: 4 Years Old

5th Child: 3 Years Old

The ges of any two consecutive children difference is 2 years old: 1st Child and 3rd Child.

Hope this helped! :-)

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aivan3 [116]

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2 years ago

If x + 2y = 8, and x - y = 5, what is the value of x?

klemol [59]

Answer:

x = 6

Step-by-step explanation:

Let's solve y for x + 2y = 8.

x + 2y = 8

2y = -x + 8

y = $-\frac{1}{2}$ x + 4.

Let's solve y for x - y = 5.

x - y = 5

y = x - 5

Since both equations have been solved for y, we can combine them together into one!

x - 5 = $-\frac{1}{2}$ x + 4

x $+ \frac{1}{2}$ x = 4 + 5

1.5x = 9

x = 6

Hope this helped! If not, please let me know!

4 0

2 years ago

I need help can someone help.

elena-14-01-66 [18.8K]

Answer:

I think its 22..

Step-by-step explanation:

Add 7 and 6

the subtract 35 by what you got from adding 7 and 6 (13).

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2 years ago

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jekas [21]

Answer:

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Step-by-step explanation:

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2 years ago

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a sound wave travels through iron at a rate of 5120m/s. at what rate does the sound wave travels in km/h?

Sladkaya [172]

5120 m/s = 18.432 kph

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2 years ago