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2 years ago

A student correctly answered 35 of the 40 questions on a mathematics exam. What percent did she answer correctly?

Mathematics

1 answer:

GrogVix [38]2 years ago

7 0

Answer:

87.5%

Step-by-step explanation:

To find a percentage of questions correct divide the number of correct answers by the total number of questions and then multiply that by 100.

(35/40)100=87.5

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What is the value of p

aivan3 [116]

180 is the degree of the whole angle so you subtract 180 from 77 to get P
180-77=103
P=103

6 0

2 years ago

Factorise fully the following: a) x² + 2x b) 2x² - 6x c) 15x - 10x³ d) 9x² + 3x³

Lostsunrise [7]

Answer:

a) $x(x+2)$

b) $2x(x-3)$

c) $5x(3-2x^2)$

d) $3x^2(3+x)$

Step-by-step explanation:

a) $x^2+2x$

When factoring a binomial (a polynomial with two terms), what we will be looking for are the terms that are shared between them.

In this problem, it can be seen that both of these terms have and x. This means that we can factor it out to get

$x(x+2)$

b) $2x^2-6x$

What are the common terms here?

It can be seen that each of these share a 2x, so our factored form would be

$2x(x-3)$

c) $15x-10x^3$

What about this one?

The common factor of this one is 5x, so our factored form would be

$5x(3-2x^2)$

d) $9x^2+3x^3$

The common factor of this one is $3x^2$ , so our factored form would be

$3x^2(3+x)$

6 0

3 years ago

I forgot how to do this. Can anyone help me please

Svetach [21]

Answer:

Step-by-step explanation:

180 since it is supplementary

then minus 100 which is 80 then minus 12 which is 68 then half that which is 34

7 0

2 years ago

Read 2 more answers

What is the value of x

Sloan [31]

Answer:53

Step-by-step explanation:

6 0

3 years ago

What is the conjugate of the product (2 - i)(1+2i)?

ivann1987 [24]

Answer:

4-3i is the answer.......

Explanation

Product

(2-i)(1+2i) = 2+4i-i-2i²

= 2+4i-i+2

= 4+3i

conjugate of 4+3i is 4-3i

8 0

3 years ago