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3 years ago

The greatest solution of x in the equation x^2+8x−30=18

Mathematics

2 answers:

solmaris [256]3 years ago

3 0

Answer:

The two possible outcomes are 4 and -12, so 4

Step-by-step explanation:

Nikolay [14]3 years ago

3 0

Answer:

X=4, -12

Step-by-step explanation:

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Latesha buys some tennis balls at $1 each and rackets at $12 each for her PE class. She buys twice as many balls as rackets. She

marysya [2.9K]

I would go with A it makes most sense to me .

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4 years ago

Find each percent increase round to the nearest percent from $5 to $8

asambeis [7]

First subtract the two numbers:

8 - 5 = 3

Now divide this to the original:

3 / 5 = 0.6

Multiply by 100:

0.6 * 100 = 60%

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4 years ago

Mikayla wants to buy a dress that is on sale for 25% off. The original price was $84 and sales tax is 5%. What is the total pric

Feliz [49]

Answer:

$67.20

Step-by-step explanation:

84 x .05

4.2

84 x .25

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3 years ago

8.46 If 100 is decreased by a% and the result is decreased by b%, then what is the total percent decrease (in terms of a and b)?

Marysya12 [62]

Answer:

The total percent decrease is $a+b-\frac{a b}{100}$

Step-by-step explanation:

We are given with a word problem
We are asked to find the total percentage decrease
We can do this in two steps

Step 1: Finding the two percentage decrease

Step 2: Finding their difference

Step 1 of 2

Let the decrease by a% be 100-a

Then b% decrease is

$\begin{aligned}\frac{b}{100} \times(100-a) &=\frac{100 b-a b}{100} \\\frac{100 b}{100}-\frac{a b}{100} &=b-\frac{a b}{100}\end{aligned}$

Step 2 of 2

The percentage difference between the two percentages is,

$\begin{aligned}&(100-a)-\left(b-\frac{a b}{100}\right)=100-a-b+\frac{a b}{100} \\&100-a-b+\frac{a b}{100}=100-\left(a+b-\frac{a b}{100}\right)\end{aligned}$

Since 100 is the total percent $a+b-\frac{a b}{100}$ is the percentage decrease.

3 0

2 years ago

Use the Order of Operations to evaluate this expression

Doss [256]

Unfortunately, I don’t knooow :(

5 0

3 years ago