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4 years ago

6

I seriously forgot this.

1 answer:

Tanya [424]4 years ago

8 0

I hope this helps you

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If y + 2q = 15, q + 2p = 5 and p + 2y = 7, then ﬁnd<br> the value of p + q + y.

notsponge [240]

$y+2q=15\\
y=15-2q\\\\
p+2y=7\\
p+2(15-2q)=7\\
p+30-4q=7\\
-3q+30=7\ \ \ |Subtract\ 30 \\
-3q=-23\ \ \ |Divide\ by\ -3\\
q=\frac{23}{3}\\\\
y=15-2q=15-2(\frac{23}{3})=15-\frac{29}{3}=15-7=8\\\\
p=7-2y\\
p=7-2*8\\
p=7-16=-9\\\\
\textbf{p+q+y=}-9+\frac{23}{3}+8=-1+7\frac{2}{3}=\boxed{6\frac{2}{3}}
$

5 0

3 years ago

pleasee help me,A train travels from station P to station Q at a speed of 90km/h in 3hours 40minutes.The train stops at station

nataly862011 [7]

I think it may be that the train is going too fast zoom km 1600 km at the end

5 0

3 years ago

H varies directly to the cube of c.<br> When H = 40, C = 2.<br> (a) Express H in terms of c.

Alecsey [184]

Answer:

H in terms of c is H = 5c³.

Step-by-step explanation:

Given that:

H = 40 and c = 2

H varies directly to the cube of c.

Which means that,

H ∝ c³

Let,

k be the proportionality constant.

H = kc³

Putting H=40 and c=2

$40=k(2)^3\\40=k(8)\\40=8k\\8k=40$

Dividing both sides by 8,

$\frac{8k}{8}=\frac{40}{8}\\k=5$

Now,

H in terms of c.

H = 5c³

Hence,

H in terms of c is H = 5c³.

4 0

3 years ago

What is the value of the expression when a=18 and b=14 ?

Ivenika [448]

Answer:

1) 1/2 (18+14) - (18-14)^2

2) 1/2 (32) - (4)^2

2) 16 - 16

3) 0

Therefore, the answer is D

Step-by-step explanation:

Hope this helps :D

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3 years ago

Find the missing side of the triangle

masha68 [24]

Answer:

197 is the missing side of the triangle

8 0

3 years ago

Read 2 more answers