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2 years ago

Brian is purchasing a $60 sweater at 25% off. There is an additional

Mathematics

2 answers:

Dovator [93]2 years ago

6 0

The total amount Brian will pay is $20.00

kvv77 [185]2 years ago

3 0

Answer:

The sweatshirt is now 50 dollars

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1+secA/sec A = sin^2 A / 1-cos A

Fofino [41]

Answer: see proof below

<u>Step-by-step explanation:</u>

$\dfrac{1+\sec A}{\sec A}=\dfrac{\sin^2 A}{1-\cos A}$

Use the following Identities:

sec Ф = 1/cos Ф

cos² Ф + sin² Ф = 1

<u>Proof LHS → RHS</u>

$\text{LHS:}\qquad \qquad \dfrac{1+\sec A}{\sec A}$

$\text{Identity:}\qquad \qquad \dfrac{1+\frac{1}{\cos A}}{\frac{1}{\cos A}}$

$\text{Simplify:}\qquad \qquad \dfrac{\frac{\cos A+1}{\cos A}}{\frac{1}{\cos A}}\\\\\\.\qquad \qquad \qquad =\dfrac{1+\cos A}{1}$

$\text{Multiply:}\qquad \qquad \dfrac{1+\cos A}{1}\cdot \bigg(\dfrac{1-\cos A}{1-\cos A}\bigg)\\\\\\.\qquad \qquad \qquad =\dfrac{1-\cos^2 A}{1-\cos A}$

$\text{Identity:}\qquad \qquad \dfrac{\sin^2 A}{1-\cos A}$

$\text{LHS = RHS:}\quad \dfrac{\sin^2 A}{1-\cos A}=\dfrac{\sin^2 A}{1-\cos A}\quad \checkmark$

3 0

3 years ago

I need to show my work, could anyone help? (need by tonight 3/10/20

marishachu [46]

Answer:

14 gallons....$42

Step-by-step explanation:

The car requires one gallon every 32 miles...

The car requires c gallons for 448 miles

c = 448 × 1 / 32

= 14 gallons..

One gallon = $3

Fourteen gallons = ??

14 × 3 / 1 = $42

3 0

3 years ago

Combine like terms: 80 + 50m + 65 + 40m

Nuetrik [128]

Answer:

90m+145

Step-by-step explanation:

80 + 50m + 65 + 40m

90m+145

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2 years ago

PLEASE HELP ME!!! WILL MARK AS BRAINLIEST!!!!!!!

frez [133]

Esmeralda I think it's wrong cuz it’s like the question but that's added a parentheses so I think that's wrong

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3 years ago

A certain drug is made from only two ingredients: compound a and compound

Sedaia [141]

In total there will be 688 milliliters of compound used 258 from compound B and 430 milliliters of compound A so 688 in total.

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3 years ago

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