All categories

3 years ago

Solve for x. 3x ^2 -4 = 8

Mathematics

2 answers:

LenKa [72]3 years ago

5 0

Answer:

x = ±2

Step-by-step explanation:

3x ^2 -4 = 8

Add 4 to each side

3x ^2 -4+4 = 8+4

3x^2 =12

Divide each side by 3

3x^2 =12

3x^2/3 = 12/3

x^2 = 4

Take the square root of each side

sqrt(x^2) = ±sqrt(4)

x = ±2

hodyreva [135]3 years ago

4 0

Answer:

x = 2

Step-by-step explanation:

3x ^2 -4 = 8

3x^2 = 12

3x^2/3 = 12/3

x^2 = 4

Square root 4 is 2

x = 2

You might be interested in

Identify THREE vocabulary words that also refer to x-intercepts.

Marianna [84]

Answer:

X-intercepts are also called zeros, roots, solutions, or solution sets.

7 0

3 years ago

Read 2 more answers

Pls Answer! Will give brainliest. Khanna earns a annual salary of $33,000. Her federal income tax bracket is 20%. She also must

maks197457 [2]

Answer: $3,581

Step-by-step explanation:

As she plans to save from her net income, we have to find the net income first:

= Net income - Federal taxes - Social and Medicare taxes

= 33,000 - (33,000 * 20%) - (33,000 * 7.65%)

= $23,875.50

The savings will be:

= Net income * Savings percentage

= 23,875.50 * 15%

= $3,581.325

= $3,581

8 0

3 years ago

Which of the following graphs represents the solution to the inequality (x−2)−2≥−6 ?

sertanlavr [38]

Can u be more specific on the options? Cuz there’s nothing for ABCD.

8 0

2 years ago

??fkdkddkdkdkdkdkddkdkdkdkdkdkwpdle,ws

GalinKa [24]

The answer is (D) ....

6 0

3 years ago

Read 2 more answers

The student council sold jars of mixed nuts at their bazaar they were given 40 empty jars. They paid $19.60 for the nuts and $11

Alex Ar [27]

Answer:

$\$1.75$

Step-by-step explanation:

Total amount paid for the nuts is $19.60

Total amount paid for the ribbons is $11.20

Profit made on each jar is 98￠= $0.98

Cost price of the nuts and ribbon for the 40 jars is $19.6+11.2=\$30.8$

Cost price for nuts and ribbonn for one jar = $\dfrac{30.8}{40}=\$0.77$

Selling price is the sum of the cost price and profit.

Selling price for one jar = $0.77+0.98=\$1.75$

They charged $\$1.75$ for each jar.

3 0

2 years ago