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kumpel [21]
3 years ago
9

Why did this app make me fail my test?

Mathematics
2 answers:
Dvinal [7]3 years ago
5 0
Not everyone is always right.
Yuki888 [10]3 years ago
4 0
Probably because people gave you the wrong answer. Not saying they did this intentionally....
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The rectangle shown has a perimeter of 156 cm and the given area. Its length is 6 more than five times its width.
Stells [14]
P=156 cm
l=6+5w
P=2(l+w)
156=2(6+5w+w)
156=2(6+6w)
156=12+12w
12+12w=156
12w=156-12
12w=144
w=12cm

l=6+5•12
l=6+60
l=66cm
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2 years ago
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I just want ponts so just go on google 45775576467

4 0
3 years ago
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Quick help with math please? 50 points.
Elden [556K]

y≤-2x +2

y< 1/3x +2

this is the answer to this

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(WILL GIVE BRAINLIEST) I NEED HELP ASAP!!!
aleksandr82 [10.1K]

Answer:

which ones do you need answered? all of them? want to help

Step-by-step explanation:

4 0
3 years ago
Is y=7.5x a proportional relationship and why
DerKrebs [107]
Direct Proportion functions look like this:

y=kx

'k' is the constant of proportionality and in this case its 7.5 or 15/2.

--------------------------------------------

When x=1, y=7.5
When x=2, y=15
When x=3, y=22.5

Therefore y is directly proportional to x.

--------------------------------------

DIRECT PROPORTION EXPLAINED:

Say a football costs £7.50. If you buy one football you'll have to pay out £7.50, but if you you buy two footballs you'll have to pay out £15.00. Therefore the cost of the football(s) is directly proportional to the amount of footballs you buy. C=cost, f=football(s) and C<span>∝f, therefore C=kf, but as k=7.5, C=7.5f.

INVERSE PROPORTION EXPLAINED:

If it were to take 8 hours for one bricklayer to set up a wall, how long would it take for two bricklayers to set up a wall? The answer in this case would be 4 hours.

T=time to set up a wall
b=bricklayer(s)

Therefore T</span><span>∝1/b, and T=k/b. In this case k=8 so T=8/b.

When b=1, T=8.
When b=2, T=4.

We'd say that the time it would take for bricklayers to set up a wall would be inversely proportional to the amount of bricklayers available.</span>
4 0
3 years ago
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