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noname [10]
3 years ago
15

I need to find x for these

Mathematics
1 answer:
Ludmilka [50]3 years ago
3 0

Answer:

1. x = 2

2. x = -2

3 x = 1

Step-by-step explanation:

Make x the subjects and work from there

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What step gets you closer to the solution of this equation 5•(x-2)=7
viktelen [127]
You do 5 times x and -2 so you’d get 5x-10=7. Then add 10 to both sides to get 5x=17 and divide 17/5 to get 3.4
5 0
3 years ago
Given that these triangles are similar, what is the perimeter of triangle PQR? Show your work.
dimaraw [331]

Answer:

24

Step-by-step explanation:

I use the Pythagoras theorem.

\sqrt{a^{2} +b^{2} } =c^{2}

4^{2}{x}6^{2} = c^{2}

16 x 36= 576

\sqrt{576} = 24

6 0
3 years ago
In Vancouver, British Columbia, the probability of rain during a winter day is 0.42, for a spring day is 0.23, for a summer day
nadezda [96]

Answer:

31.82% probability that this day would be a winter day

Step-by-step explanation:

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening

In this question:

Event A: Rain

Event B: Winter day

Probability of rain:

0.42 of 0.25(winter), 0.23 of 0.25(spring), 0.16 of 0.25(summer) or 0.51 of 0.25(fall).

So

P(A) = 0.42*0.25 + 0.23*0.25 + 0.16*0.25 + 0.51*0.25 = 0.33

Intersection:

Rain on a winter day, which is 0.42 of 0.25. So

P(A \cap B) = 0.42*0.25 = 0.105

If you were told that on a particular day it was raining in Vancouver, what would be the probability that this day would be a winter day?

P(B|A) = \frac{0.105}{0.33} = 0.3182

31.82% probability that this day would be a winter day

6 0
3 years ago
The surface area of yringaler prism​
Trava [24]

Answer:

180 cm

Step-by-step explanation:

2(3*10) = 60

3*12 = 24

1/2(12*8) * 2 = 96

formula for a triangle is 1/2 b h

7 0
3 years ago
How to solve. 0.05x+0.02x=4.9
vitfil [10]
<span>0.07x = 4.9 I hope this helps (;</span>
3 0
3 years ago
Read 2 more answers
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