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-BARSIC- [3]
3 years ago
6

Help me plssssssssssssssssssssssssssssss

Mathematics
1 answer:
Naddika [18.5K]3 years ago
5 0

Answer: See explanation (btw, the answer is always in bold letters)

Step-by-step explanation:

1.) 1 gallon for $1.99

1/2 gallon for $0.98

1 gallon would be 0.98 × 2 = <em>1.96</em>

2 gallons for $3.98

1 gallon would be 3.98 ÷ 2 = 1.99

2.) 621 ÷ 4 = 155.25

He pays $155.25 each payment!

3.) V = s³

s = 3

V = 3³

3 × 3 × 3 = 27

V = 27 m³

4.) This is a rectangle; the area of a rectangle is l × b.

L = 6.9

l × b = a

6.9b = 28.29

Divide both sides by 6.9

b = 4.1

The missing length is 4.1 m

5.) False

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(sinx) / (1-cosx) =cscx+cotx
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~~\text{L.H.S}\\\\=\dfrac{\sin x}{1-\cos x}\\\\\\=\dfrac{\sin x(1+ \cos x)}{(1 -\cos x)(1+ \cos x)}\\\\\\=\dfrac{\sin x + \sin x \cos x}{1- \cos^2 x}\\\\\\=\dfrac{\sin x+ \sin x \cos x}{\sin^2 x}\\\\\\=\dfrac{\sin x}{ \sin^2 x}+ \dfrac{\sin x \cos x}{ \sin^2 x}\\\\\\=\dfrac{1}{ \sin x} + \dfrac{\cos x}{ \sin x}\\\\\\=\csc x + \cot x\\\\\\=\text{R.H.S}\\\\\text{Proved.}

7 0
2 years ago
4. Molly had $21 to spend on two notebooks. After buying them he had $13. How much did each notebook cost? 
otez555 [7]
21-13=8
8/2=4
Each notebook costs $4
Hope this helps :)
8 0
3 years ago
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Find the sum of the finite geometric series<br> -3+6-12+24+-48+96-192+384
hammer [34]
255 (hope this helped)
3 0
3 years ago
A new car has a sticker price of $26,450, while the invoice price paid on it was $20,450. What is the percentage markup?
MrRa [10]
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3 years ago
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Evaluate the following functions for the given value.<br> 19. f(x) = -x3 + x2; -2
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Answer:

12

Step-by-step explanation:

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   = 12

3 0
2 years ago
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