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tiny-mole [99]
3 years ago
15

I need help on all these, plss !!​

Mathematics
1 answer:
dolphi86 [110]3 years ago
3 0

Answer:

8a) 100,90,110,70, 130

8b) 110, 100,120,80,140

8c)110

8d) Once you added 10 to each number the mean had a value of +10

8e) Make 8 points higher on each test.

Step-by-step explanation:

Hope this helps and have a great day!!

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Prove these identities <br>(i) secx cosecx - cotx = tanx<br>​
brilliants [131]

Answer:

(A)\frac 1 {cosx} \frac 1 {sin x}  - \frac {cosx} {sin x} = \frac {sin x} {cosx} \\\\(B)\frac{1-cos^2 x }{cos x sin x} = \frac {sin x} {cosx} \\\\(C) \frac{(sin^2x + cos^2x)-cos^2 x }{cos x sin x} = \frac {sin x} {cosx} \\\\(D) \frac{sin^2x }{cos x sin x} = \frac {sin x} {cosx}\\\\(E)\frac {sin x}{cos x} = \frac {sin x}{cos x}

In step A, you replace all trigonometric functions with their definitions in terms of sine and cosine.

In step B, you add the two together as you add fractions.

In step C, you replace 1 with the sum of the squares of sine and cosine.
In step D, you add the cosine terms together so they disappear.

In step E, finally, you divide numerator and denominator by sin x.

3 0
2 years ago
jocelyn bought 2 sweaters for the same price.she paid $23.56, including sales tax of $1.36 and a $5.00 discount coupon.what was
k0ka [10]
<span>Jocelyn bought 2 sweaters for the same price.
She paid $23.56, including sales tax of $1.36 and a $5.00 discount coupon.
Problem: Find the price of 1 sweater before the tax and coupon
=> 2 sweaters = 23.56 dollars included tax and discount
=> remove the tax and discount first
=> 23.56 + 5.00 = 28.56 dollars since this is a discount, we need to add this to the amount
=> 28.56 – 1.36 =  27.2 dollars is the price of 2 sweaters
=> 1 sweater costs 13.6 dollars </span>



4 0
2 years ago
How to change 45% into a fraction <br> How to change 120% into a fraction
Eddi Din [679]

Answer: 3/25 and 9/20

Step-by-step explanation:

We take the number and covert it into a fraction

A 2 digit Numerator = a 3 digit denominator

A 3 digit Numerator = a 4 digit denominator

And so on...

Then We can reduce,

45/100 = 9/20

120/1000 = 3/25

Hope this helped!

7 0
2 years ago
5.x.10=150 find x<br> 6.x.100=1000
Shkiper50 [21]

Answer:

I think X is 3. Sorry if it's wrong!

Step-by-step explanation:

5 x 3 = 15 x 10 = 150

3 0
2 years ago
What is 24 percent of 25
Mkey [24]

6

24% = \frac{24}{100}

multiply 25 by this fraction

25 × \frac{24}{100} = \frac{25(24)}{100} = 6


4 0
3 years ago
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