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3 years ago

Mary had five and one half dollars she spent two and one fourth dollars on a snack how much money does Mary have left

2 answers:

4 0

3 and 1/4 dollars. Having 5 1/2 dollars is equal to $5.50 and spending 2 1/4 dollars is $2.25. So by subtracting 2.25 from 5.50, you get $3.25, or 3 1/4.

Daniel [21]3 years ago

3 0

Answer:

3 and 1/4

Step-by-step explanation:

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Prove that:- (1-sinA)(1+sinA)÷(1+cosA)(1-cosA)=cot^2A

astraxan [27]

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identity

sin²x + cos²x = 1 , then

sin²x = 1 - cos²x and cos²x = 1 - sin²x

Consider the left side

$\frac{(1-sinA)(1 + sinA)}{(1+cosA)(1-cosA)}$ ← expand numerator/denominator using FOIL

= $\frac{1-sin^2A}{1-cos^2A}$

= $\frac{1-(1-cos^2A)}{1-(1-sin^2A)}$

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

= $\frac{cos^2A}{sin^2A}$

= cot²A = right side , thus proven

6 0

3 years ago

Which number line shows the solutions of 13x−8≥x+6?

Leviafan [203]

$13x - x \geqslant 6 + 8 \\ 12x \geqslant 14 \\ x \geqslant \frac{14}{12} = \frac{7}{6 } = 1.167 \\ x \geqslant 1.167$

i hope it helps u

4 0

3 years ago

Read 2 more answers

How can we eliminate an imaginary from the denominator? Simplify 2/(3+5i) to demonstrate.

alexira [117]

Multiply by the conjugate and simplify
3/17 - 5i/17

Hope this helps! :)

7 0

3 years ago

I need help ASAP

GaryK [48]

Answer:

500

Step-by-step explanation:

Define listed price = C

Based on the term, to have the balance on both plan, the equation is 30+90%C = 80+80%C

30+0.9C=80+0.8C
0.1C=50
1C = 500

6 0

3 years ago

What are two decimals that are equivalent to 7.7

Elza [17]

7.70 and 7.700 they are all the same since the 7 tenths are still in its place

8 0

3 years ago