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Lisa [10]
3 years ago
12

Please answer this in two minutes there can be more than one option

Mathematics
1 answer:
aleksklad [387]3 years ago
4 0

Answer:

i believe it would be the first and second options

Step-by-step explanation:

the planes RUV and RST touch at line RU

the planes RSV and RUV touch at line RV

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Find the slope of the line through each pair of points (2, -11), (7, -20)
baherus [9]
7 - 2 = 5
-20 + 11 = -9
slope is 5/-9 or -5/9
(5 right / 9 down)
5 0
2 years ago
Can some plz help?:)
love history [14]

I didn’t know the answer sorry

4 0
4 years ago
4 men and 6 boys can finish a piece work in 5 days while 3 men and 4 boys can finish it in 7 days. find the time taken by 1 man
Anon25 [30]

Answer:

Number of days taken by 1 man alone and 1 boy alone are 35 days and 70 days respectively.

Step-by-step explanation:

Let, the work completed by 1 man in 1 day = x and the work completed by 1 boy in 1 day = y.

So, 4 men and 6 boy's 1 day work is \frac{4}{x} and \frac{6}{y}

And, 3 men and 4 boy's 1 day work is \frac{3}{x} and \frac{4}{y}

Since, 4 men and 6 boys complete the work in 5 days and 3 men and 4 boys complete the work in 7 days.

So, we have,

\frac{4}{x}+\frac{6}{y}=\frac{1}{5}

\frac{3}{x}+\frac{4}{y}=\frac{1}{7}

Let, u=\frac{1}{x} and v=\frac{1}{y}

So, the equations are,

4u+6v=\frac{1}{5}  ................(1)

3u+4v=\frac{1}{7}  ................(2)

Multiply (1) by 3 and (2) by 4 and subtract the equations, we get,

2v=\frac{1}{35} i.e. v=\frac{1}{70} i.e. \frac{1}{y}=\frac{1}{70} i.e. y = 70.

Substitute value of 'v' in (1) gives,

4u+\frac{6}{70}=\frac{1}{5} i.e. 4u=\frac{-6}{70}+\frac{1}{5} i.e. 4u=\frac{8}{70} i.e. u=\frac{8}{70\times 4} i.e. u=\frac{1}{35} i.e. \frac{1}{x}=\frac{1}{35} i.e. x = 35

So, the number of days taken by 1 men alone and 1 boy alone are 35 days and 70 days respectively.

4 0
4 years ago
A survey was conducted with a large group of teenagers from 6 different states and it asked them for their favourite sport out o
UkoKoshka [18]

Answer:

H0: There is no association between state and sporting preference.

H1: There is an association between state and sporting preference

Step-by-step explanation:

The hypothesis to be tested for is whether the factor 'state' is associated with the factor 'sporting preference'.

The study is therefore about 'association' and whether the distributions of sporting preferences are identical across states. In scenario in this case is the test for association which is the most appropriate test.

Two factors are deemed to not be associated unless there is supporting evidence to suggest otherwise. Since the null hypothesis is the default belief, the correct pair of hypotheses are:

H0: There is no association between state and sporting preference.

H1: There is an association between state and sporting preference

3 0
3 years ago
X^2 - x - 60 factor it
s344n2d4d5 [400]

I wrote my decision of this example on a piece of paper.

3 0
3 years ago
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