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3 years ago

HELP ME ILL GIVE 25 POINTS

Mathematics

2 answers:

Ksivusya [100]3 years ago

6 0

40/30 = 60/45
40 * 45 = 60 * 30
1800 = 1800 the triangles are similar

Sonbull [250]3 years ago

4 0

△ABC~<span>△YZX
You just figure out what sides are similar to each other

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Help please I beg of the

Anika [276]

Answer:

1 would be on 1.4 so before 1.5 on the line

2 would be on around 4.1 so after 4.0 by a little

3 would be on 3.3 so kind of in the middle of 3.0 and 3.5

4 would be on 2.8 so before 3.0

5 is on 2.2 so a little after 2.0

6 would be just a little more than 5 around 5.09

11 is E

12 is A

13 is D

14 is C

15 is B

16 is B

17 is A

18 is D

19 is C

20 is E

All you have to do is find the square root through a calculator then round your answer and estimate where it would go on the line. Hope this helped

7 0

3 years ago

an inlet pipe and a hose together can fill the pond in 10 hours. The inlet pipe alone can complete the job in one hour less time

Annette [7]

Answer:

The hose pipe can fill the pond in 21.465 hours.

The inlet pipe can fill the pond in 20.465 hours.

Step-by-step explanation:

Given that, a inlet pipe and a hose pipe together can fill the pond in 10 hours.

The inlet pipe alone can fill the pond in one hour less time than the hose pipe can fill the pond.

Let the hose pipe can complete the job in x hours.

Then the inlet pipe can fill the pond in (x-1) hours.

The rate of filling of hose pipe is $=\frac{1}{x}$

The rate of filling of inlet pipe is $=\frac{1}{x-1}$

The rate of filling of both pipes is = $\frac 1{10}$

According to the problem,

$\frac{1}{x}+\frac{1}{x-1}=\frac{1}{10}$

$\Rightarrow \frac{x-1+x}{x(x-1)}=\frac1{10}$ [ simplifying the fraction]

$\Rightarrow \frac{2x-1}{x^2-x}=\frac1{10}$

$\Rightarrow 10(2x-1)= x^2-x$ [ Multiplying 10(x²-x) both sides]

$\Rightarrow x^2-x= 20x-10$

$\Rightarrow x^2-x-20x+10=0$ [ simplifying ]

$\Rightarrow x^2-21x+10=0$

$\Rightarrow x=\frac{-(-21)\pm\sqrt{(-21)^2-4.1.10}}{2.1}$ [ applying quadratic formula]

$\Rightarrow x=\frac{21\pm21.93}{2.1}$

⇒ x= 21.465, -0.465

x= - 0.465 does not possible, since time can not be negative.

∴x=21.465

The hose pipe can fill the pond in 21.465 hours.

The inlet pipe can fill the pond in (21.465-1)=20.465 hours.

3 0

4 years ago

What are the coordinates of the midpoint of the segment whose endpoint are P(-6, 3) and Q(9, -11)

poizon [28]

Answer:

$\large\boxed{C.\ (1.5,\ -4)}$

Step-by-step explanation:

The formula of a midpoint of a segment AB with endpoints at A(x₁, y₁) and B(x₂, y₂):

$M_{AB}\left(\dfrac{x_1+x_2}{2},\ \dfrac{y_1+y_2}{2}\right)$

We have the points P(-6, 3) and Q(9, -11).

Substitute:

$M_{PQ}(x,\ y)\\\\x=\dfrac{-6+9}{2}=\dfrac{3}{2}=1.5\\\\y=\dfrac{3+(-11)}{2}=\dfrac{-8}{2}=-4$

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KatRina [158]

the answer to your question is 7

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Svetllana [295]

Answer:

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