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kogti [31]
3 years ago
6

2b^2x^2+3a^2y^2=a^2b^2 for b^2

Mathematics
1 answer:
Artemon [7]3 years ago
4 0

Answer:

{b}^{2}  =  \frac{3 {a}^{2}  {y}^{2} }{ {a}^{2}  - 2 {x}^{2} }

Step-by-step explanation:

We want to solve for b² in

2 {b}^{2}  {x}^{2}  + 3 {a}^{2}  {y}^{2}  =  {a}^{2}  {b}^{2}

Combine terms containing b²

3 {a}^{2}  {y}^{2}  =  {a}^{2}  {b}^{2}  - 2 {b}^{2}  {x}^{2}

Factor b² to get:

3 {a}^{2}  {y}^{2}  =  ({a}^{2} - 2 {x}^{2}) {b}^{2}

Divide by a² -2b²

{b}^{2}  =  \frac{3 {a}^{2}  {y}^{2} }{ {a}^{2}  - 2 {x}^{2} }

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Amy has $1,000 in a savings account at the beginning of the fall. She wants to have at least $500 in the account by the end of t
LuckyWell [14K]

Answer:

D. 1000 - 100w \geq 500; w \leq 5

Step-by-step explanation:

Given:

Initial amount in the bank = $1000

Money withdrawn each week = $100

Final amount should be at least $500.

Now, let the number of weeks the money is withdrawn be 'w'.

Therefore,

Money withdrawn in 'w' weeks = \textrm{Money withdrawn each week}\times w

Total Money withdrawn in 'w' weeks = 100w

Now, final amount after 'w' weeks is equal to the difference between initial amount and total withdrawal amount. Therefore,

Final amount = Initial amount - Total withdrawal amount

Final amount = 1000 - 100w

Now, final amount must be greater than or equal to $500. So,

\textrm{Final amount}\geq500\\\\1000-100w\geq500

Therefore, the  inequality that represents the inequality for the number of weeks Amy can withdraw money is:

1000-100w\geq500

Now, let us solve for 'w'.

Adding -500 and 100w both sides, we get:

1000-500-100w+100w\geq500-500+100w\\\\500\geq100w\\\\\textrm{The above inequality is reversed when taking 100w on the left side}\\\\100w\leq500\\\\w\leq\frac{500}{100}\\\\\therefore w\leq5

Therefore, the correct option is (D).

7 0
3 years ago
Which of the following expressions shows the expression 1/2x+3−2/5x+1 in simplest form?
viva [34]
It’s A)1/10x+4 Hope that’s helps!!!
7 0
2 years ago
Read 2 more answers
5 less than a number is equivalent to 1 more than three times the number<br><br> The number is ??
givi [52]

Answer:

-3

Step-by-step explanation:

Let x equal the mystery number

Our equation will be:

x - 5 = 1 + 3x

Subtract x from both sides

-5 = 1 + 2x

Subtract 1 from both sides

-6  = 2x

Divide both sides by 2

-3 = x

4 0
3 years ago
Which expression is equivalent <br> to 5.7 × 5.7 × 5.7?
Burka [1]
The answer is C!!!!!!!!!!!
4 0
2 years ago
Read 2 more answers
At the fair 4 employees were paid $8.75 an hour to work at a funnel cake stand. They worked 8 hours at regular pay then for 5 ho
nordsb [41]

Answer:

$125.25

Step-by-step explanation:

8.75*h+11.25*e

h is hours regular pay and e is extra pay for overtime. Since its an extra $2.50 for overtime, add that to the regular pay. Put in the hours:

8.75*8+11.25*5

Simplify by multiplying 8.75 by 8

70+11.25*5

Simplify by multiplying 11.25 by 5

70+56.25

Add

70+56.25=126.25

Since it says how much did each earn, as in individually, leave it as it is (unless regular pay was $2.18 an hour, which would be a rip-off). I'm pretty sure including the number of employees was meant to throw you off.

7 0
3 years ago
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