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4 years ago

39% of 50 is what number

2 answers:

5 0

Convert percent into a decimal by moving the percent sign two places to the left.

39% => 0.39

'Of' in math means multiply.

0.39 * 50 = 19.5

Nady [450]4 years ago

3 0

You do decimal multipliers
50 x 0.39
= 19.5

hope this helps you

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What is the value of x in 34 + 2x = 40

alekssr [168]

Hello from MrBillDoesMath!

Answer:

Discussion:

34 + 2x = 40 => subtract 34 from both sides

(34-34) + 2x = 40 - 34 => as (34-34) = 0 and 40-34 = 6

2x = 6 => divide both sides by 2

x = 6/2 = 3

Check the answer:

Does 34 + 2x = 40 if x = 3 ?

Does 34 + 2(3) = 40 ?

Does 34 + 6 = 40 ? YES! so the answer checks.

Thank you,

MrB

4 0

3 years ago

Read 2 more answers

Use the ratio table to solve the percent problem.

aliina [53]

It would be; 90 * 20%
= 90 * 0.20
= 18

In short, Your Answer would be 18

Hope this helps!

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3 years ago

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3 years ago

Students who score within 14 points of the number 88 will pass a particular test. Write this statement using absolute value nota

solniwko [45]

Answer:

|88-x| ≤ 14

Step-by-step explanation:

their score has to be within 14 points of 88.

if their score is above 88, the number will be negative, but the absolute value makes the number positive. if that number is still within 14 of 88, they pass.

if their score is below 88, the number will be negative, and the absolute value keeps the number positive. if that number is still within 14 of 88, they pass.

8 0

3 years ago

WEDNESDAY: Use the quadratic formula to solve the following: 3x^2 - 6x-12 = 0*

Pepsi [2]

Answer:

a.) 3.236 or -1.236

Step-by-step explanation:

Used an online calculator for this answer...

Using the Quadratic Formula where

$x = \frac{ -b \pm \sqrt{b^2 - 4ac}}{ 2a }\\x = \frac{ -(-6) \pm \sqrt{(-6)^2 - 4(3)(-12)}}{ 2(3) }\\x = \frac{ 6 \pm \sqrt{36 - -144}}{ 6 }\\x = \frac{ 6 \pm \sqrt{180}}{ 6 }$

The discriminant b^2−4ac > 0

so, there are two real roots.

Simplify the radical...

$x = \frac{ 6 \pm 6\sqrt{5}\, }{ 6 }\\x = \frac{ 6 }{ 6 } \pm \frac{6\sqrt{5}\, }{ 6 }\\x = 1 \pm \sqrt{5}\,$

This simplifies to...

$x = 3.23607\\x = -1.23607$

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4 years ago