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3 years ago

Please help will name brainliest: Make y the subject of the formula x=a-2by²

Mathematics

2 answers:

lozanna [386]3 years ago

4 0

Answer:

y = ± $\sqrt{\frac{a-x}{2b} }$

Step-by-step explanation:

Given

x = a - 2by² ( add 2by² to both sides )

x + 2by² = a ( subtract x from both sides )

2by² = a - x ( divide both sides by 2b )

y² = $\frac{a-x}{2b}$ ( take the square root of both sides )

y = ± $\sqrt{\frac{a-x}{2b} }$

Alenkasestr [34]3 years ago

4 0

Answer:

$y = a - x \di2b$

Step-by-step explanation:

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

$2b {y}^{2} \div 2b = a - x \ \div 2b$

${y}^{2} = a - x \div 2b$

$y = \sqrt{a - x \div 2b}$

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Please help me with this

ArbitrLikvidat [17]

Answer:

C and D are correct in my calculations, I'm confused.. ;w;

Step-by-step explanation:

4x + 9 + 79 - x + y = 180

4x - x + y + 79 + 9 = 180

3x + y + 88 = 180

3x + y = 180 - 88

3x + y = 92

y = 92 - 3x

A.) x = 64, y = 50

y = 92 - 3x

(50) = 92 - 3(64)

50 = 92 - 192

50 ≠ - 100

B.) x = 14, y = 152

y = 92 - 3x

(152) = 92 - 3(14)

152 = 92 - 42

152 ≠ 50

C.) x = 23.3, y = 22.1

y = 92 - 3x

(22.1) = 92 - 3(23.3)

22.1 = 92 - 69.9

22.1 = 22.1

D.) x = 14, y = 50

y = 92 - 3x

(50) = 92 - 3(14)

50 = 92 - 42

50 = 50

8 0

3 years ago

10.A water tank has strps inside it. A monkeyis sitting on topmost floor(i.e.,the first step).The water level is at ninth step.

soldi70 [24.7K]

Answer:

7 steps.

Step-by-step explanation:

Since the monkey is sitting on the first step already you can subtract 9 by 1 to find the amount of steps left.

9-1 = 8 steps left

The monkey jumps 3 steps down

8-3= 5 steps

Then jumps 2 steps up

5 + 2 = 7 steps

The monkey has 7 more steps until he reaches the water level.

3 0

3 years ago

The 24 students in Mr. Brown's homeroom sold 72 magazine subscriptions. The 24 students in Mrs. Garcia's homeroom sold 98 magazi

Katyanochek1 [597]

$24students \ B............72m \\ 24students \ G............98m \\\\ 98-72=26 \ magazine \ subscripitons \\\\ \boxed{the \ homeroom \ of \ Mrs. \ Garcia \ had \ sold \ more }$

7 0

3 years ago

Read 2 more answers

What is the sum of the solutions of the equation 1.5x^2 - 2.5x -1.5 = 0? Round to the nearest hundredth.

BARSIC [14]

Answer:

$Sum = 1.67$

Step-by-step explanation:

Given:

$1.5x^2 - 2.5x -1.5 = 0$

Required

Determine the sum of the solutions

This question will be answered using quadratic formula:

$x = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}$

Where:

$a = 1.5$

$b = -2.5$

$c = -1.5$

So, we have:

$x = \frac{-(-2.5)\±\sqrt{(-2.5)^2 - 4*1.5*-1.5}}{2*1.5}$

$x = \frac{2.5\±\sqrt{6.25 +9}}{3}$

$x = \frac{2.5\±\sqrt{15.25}}{3}$

$x = \frac{2.5\±3.91}{3}$

$x = \frac{2.5+3.91}{3}$ or $x = \frac{2.5-3.91}{3}$

The sum of the solution is then calculated as:

$Sum = \frac{2.5+3.91}{3} + \frac{2.5-3.91}{3}$

Take L.C.M

$Sum = \frac{2.5+3.91+2.5-3.91}{3}$

$Sum = \frac{5}{3}$

$Sum = 1.67$

5 0

3 years ago

What is this? im not sure which one

Free_Kalibri [48]

Answer:

-2

Step-by-step explanation:

-7 + 5 = -2

If you have negatives and then add, the negative number will decrease.

if the question was -7 - 5, the answer would be -12. This is because when you subtract a number from a negative, the negative number becomes bigger.

8 0

3 years ago