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AnnyKZ [126]
3 years ago
11

Factorise the following: (4x−15)2−(x+12)2

Mathematics
2 answers:
stiks02 [169]3 years ago
8 0

Answer:

2x+9

Step-by-step explanation:

(4x-15)-(2x-24)

4x - 2x - 15 - -24

4x - 2x - 15 + 24

2x - 15 + 24

2x + 9

2x+9

GarryVolchara [31]3 years ago
8 0
There is the answer

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Can anybody help with this pls :)
klasskru [66]

Answer:

54 degrees

Step-by-step explanation:

4x + 6 + 11x - 6 = 180

Then solve

7 0
3 years ago
Suppose a principal amount of $2079 were invested into a simple interest account that pays an annual rate of 2.31% then the amou
Anna35 [415]

Answer:

The amount of interest earned at the end of 14 years would be $672.3486

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

In this problem, we have that:

P = 2079, I = 0.0231, t = 14

So

E = 2079*0.0231*14 = 672.3486

The amount of interest earned at the end of 14 years would be $672.3486

4 0
3 years ago
The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard d
Licemer1 [7]

Complete question :

The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard deviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: 360 and 460 days

Answer:

0.67307

Step-by-step explanation:

Given that :

Mean, m = 400

Standard deviation, s = 50

Sample size, n = 6000

Obtain the standardized score :

Zscore =(x - m) / s

For X = 360

P(x < 360)

Zscore =(360 - 400) / 50

Zscore = - 40 / 50

Zscore = - 0.8

P(Z < - 0.8) = 0.21186

For X = 460

P(x < 460)

Zscore =(460 - 400) / 50

Zscore = 60 / 50

Zscore = 1.2

P(Z < 1.2) = 0.88493

P(Z < 1.2) - P(Z < - 0.8)

0.88493 - 0.21186

= 0.67307

5 0
3 years ago
Problem
densk [106]

Answer:

what.....

Step-by-step explanation:

5 0
4 years ago
Test) plz tell me! 45+68-284=?​
jeyben [28]
STEP BY STEP
68 + 45 = 113
-284 + 113 = -171

ANSWER: - 171
5 0
3 years ago
Read 2 more answers
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