3x-2y=9 2x-2y=7 (by elimination method)

Mathematics

2 answers:

Fofino [41]3 years ago

4 0

Answer: x=

Step-by-step explanation:

MariettaO [177]3 years ago

3 0

Hope this helps luv xx

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Olivia is rolling down a hill on a skateboard and is accelerating at 2.4 m/s2. After 3 seconds, she runs into Reid at the bottom

zysi [14]

Step-by-step explanation:

Hey there!!

According to the question,

Initial velocity (u) = 1.5m/s.

Acceleration (a) = 2.4 m/s^2.

Time (t) = 3 s.

Final velocity (v) = ?

We have,

$a = \frac{v - u}{t}$

Put all values.

2.4 = (v-1.5)/3

2.4×3 = v - 1.5

$7.2 = v - 1.5$

$7.2 + 1.5 = v$

Therefore, her final velocity is 8.7.

Hope it helps....

7 0

3 years ago

What is the percent increase of 6 yards to 36 yards

ra1l [238]

The percent of change=the amount of change/the starting number
in this case, the amount of change is 36-6=30
the starting number is 6
the percent of change is therefore: 30/6=5=500%

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3 years ago

You want to draft a four player tennis team. There are eight players to choose from. How many different teams can you form?

Butoxors [25]

We want to make a 4 players team, and there are total 8 players. As we know the order of selection does not matter in a team of players, only the combination of players matters.

So we would use concept of Combinations and It will be choose 4 out of 8 players.

The formula for Combination is given as follows :-

$nCr = \frac{n!}{r!*(n-r)!} \\\\
Choose \;4 \;out \;of \;8 \;players \\\\
8C4 = \frac{8!}{4!*(8-4)!} = \frac{8!}{4!*4!} \\\\
8C4 = \frac{8*7*6*5*4*3*2*1}{(4*3*2*1)*(4*3*2*1)} = \frac{8*7*6*5}{4*3*2*1} =\frac{1,680}{24} = 70 \;combinations$