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2 years ago

Which value of p is the solution of 5p-1=2p+20

Mathematics

1 answer:

Alex73 [517]2 years ago

8 0

Answer:

p=7

Step-by-step explanation:

5p-1=2p+20 first add 1 to both sides to get 5p=2p+21, then subtract 2p from both sides to get 3p=21, then divide by three to get p=7

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In an examination 80% students passed. if 15 less have appeared and 10 less have passed, the ratio of passers to failures would

Nina [5.8K]

Answer:

60 students passed, and 75 appeared in examination.

Step-by-step explanation:

Let's say s is the total number of students and p is the number of students who passed.

80% of the students passed, so:

0.8 s = p

If there were 10 less passers, and 15 less students (5 less failures), then the ratio of passers to failures would be 5/1.

(p − 10) / (s − p − 5) = 5 / 1

Simplify the second equation:

p − 10 = 5 (s − p − 5)

p − 10 = 5s − 5p − 25

6p = 5s − 15

Substitute the first equation.

6 (0.8 s) = 5s − 15

4.8 s = 5s − 15

0.2 s = 15

s = 75

p = 0.8 s

p = 60

60 students passed, and 75 appeared in examination.

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3 years ago

So what exactly is a,b,c

Gala2k [10]

If you’re talking about answers a would be the option first b would be 2nd and c would be 3rd

4 0

2 years ago

If the diameter of a sphere is 1 meter, then what is its surface area? Leave your answer in terms of π= 3.14

umka21 [38]

surface area = 4 x pi x r^2

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3 years ago

Read 2 more answers

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4vir4ik [10]

Answer:it’s b..........

Step-by-step explanation:

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3 years ago

Look at the figures. How can you prove these triangles are congruent?

Novosadov [1.4K]

Answer:

A. $\Delta ABC\cong \Delta DEF$ by the SAS postulate.

Step-by-step explanation:

We have been two triangles. We are asked to determine the theorem by which both triangles could be proven congruent.

We can see that side DF of triangle DEF is equal to side AC of triangle ABC.

We can also see that side BC of triangle ABC is equal to side EF of triangle DEF.

The including angle between sides AC and BC of triangle ABC is equal to the including angle between sides DF and EF of triangle DEF.

Since both triangles have two sides and their included angles equal, therefore, triangle ABC is congruent to triangle DEF by SAS (Side-Angle-Side) congruence and option A is the correct choice.

5 0

3 years ago

Which value of p is the solution of 5p-1=2p+20​

Which value of p is the solution of 5p-1=2p+20