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3 years ago

How to factor 1-49c^2

1 answer:

5 0

Ok so this is a difference of 2 perfect squares
1=1^2
49c^2=(7c)^2
to factor you remember
a^2-b^2=(a+b)(a-b) so

1^2-(7c)^2=(1+7c)(1-7c)

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A master student is planning to take a qualifying exam in the coming summer. She has three chances. The first one is in June. If

Soloha48 [4]

Answer:

Step-by-step explanation:

Given

$P_1=$ Probability of clearing exam in 1 st attempt=0.5

$P_2=$ Probability of clearing exam in 2 nd attempt=0.7

$P_3=$ Probability of clearing exam in 3 rd attempt=0.8

Probability that she passes the exam $=P(1 st\ attempt)+P(1\ fail)\cdot P(2\ pass)+P(1\ fail)\cdot P(2\ fail)\cdot P(3 rd pass)$

$P=0.5+0.5\times 0.7+0.5\times 0.3\times 0.8=0.97$

(b)P(Pass qualification on 2nd try|passes qualification)

P(Pass qualification on 2nd try|passes qualification) $=\frac{P(fail\ on\ 1 )\cdot P(pass\ in\ 2nd)}{P(passes)}$

P(Pass qualification on 2nd try|passes qualification) $=\frac{0.5\times 0.7}{0.97}=0.3608$

5 0

3 years ago

Completely factor the polynomial. 16x 2 - 25

Sunny_sXe [5.5K]

Answer:

(4x-5)(4x+5)

Step-by-step explanation:

16x^2 - 25

Rewriting

(4x)^2 - 5^2

We recognize that this is the difference of squares

a^2 - b^2 = (a-b) (a+b)

(4x)^2 - 5^2 = (4x-5)(4x+5)

5 0

3 years ago

What is the length of side AB of the triangle?

oee [108]

Start with the Pythagorean theorem{A²+B²=C², A and B are the sides and C is the Hypotenuse/Longest Side.}
2²+4²=C²
4+16=C²
20=C².....{now square root both sides.√}
√20=√C²
4.472= C

P.S.: hope I helped :)

7 0

3 years ago

Read 2 more answers

There are 3 times more kittens than puppies in a box. Together there are 24 animals. How many kittens are there?

Paha777 [63]

kitten : puppies

3:1

Total no.

3+1 = 4

Therefore

24÷4 = 6

(each of ratio represent 6 animals)

So,

3×6

= 18

Answers

18 kitten

6 0

3 years ago

Chloe wants to buy monitor for her bedroom the height of the monitor is 18 inches in the width is 16 inches calculate the diagon

Akimi4 [234]

Equation: a^2 + b^2 = c^2

18^2 + 16^2 = c^2

324 + 256 = c^2

C^2 = square root 580

Square root 580 reduces to 2 square root 145.

As a decimal that is: 24.08

Rounded to the nearest tenth: 24 inches.

I hope this helps! If it does please offer me the brainiest!

3 0

3 years ago