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3 years ago

BRAINLY PLS HELP ME ON THIS QUESTION!!!!

Mathematics

1 answer:

Allushta [10]3 years ago

5 0

Answer:

I'm pretty sure 10% of 82 is 8.2 and 60% of 82 is 49.2

If I'm wrong I'm sorry.......

Step-by-step explanation: I hope you have/had an amazing day<3

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The steps to derive the quadratic formula are shown below:

prohojiy [21]

Answer:

$\huge\boxed{\sf Option \ B}$

Step-by-step explanation:

$\displaystyle x^2+\frac{bx}{a} =\frac{-c}{a}$ --------------------(1)

to find the b² for the expression on the left.

Take the expression

$\displaystyle x^2 + \frac{bx}{a}$

<u>We can also write it as:</u>

$\displaystyle (x)^2 + 2(x)(\frac{b}{2a} )$

According to the formula $a^2+2ab+b^2$ , the b of this expression is $\displaystyle \frac{b}{2a}$ . So,

b² will be:

$\displaystyle =(\frac{b}{2a} )^2\\\\=\frac{b^2}{4a^2}$

So, we will add $\displaystyle \frac{b^2}{4a^2}$ to both sides in Eq. (1)

For STEP 4, the equation will become:

$\displaystyle x^2+\frac{bx}{a} + \frac{b^2}{4a^2} = \frac{-c}{a} + \frac{b^2}{4a^2}$

$\rule[225]{225}{2}$

7 0

2 years ago

Read 2 more answers

A truck can be rented from company a is $120 a day plus $0.20 per mile. company b charges $40 a day plus &0.60 per mile to r

nadya68 [22]

First need to make an equation for each

x = Miles
y = Total Cost

Comp A: 120 + 0.20x = y
Comp B: 40 + 0.60x = y

cancel out the amounts to make it easier (Subtract 40 from each)

Comp A: 80 + 0.20x = y
Comp B: 0.60x = y

insert a problem for y to solve for x

80 + 0.20x = 0.60x

Your answer is 200 miles

6 0

3 years ago

How do you find the circumference of a circle

Verdich [7]

Measure its diameter

6 0

4 years ago

Read 2 more answers

PROBLEM: Juan hires an electrician. Juan pays a one-time fee of $30. Juan also pays $45 for each hour the electrician works. A.

PolarNik [594]

Answer:

A: C=45h+30

B: C=$322.50

Step-by-step explanation:

A: We'll start with the equation for the total charge. Juan is saying he will pay a one time fee of $30, meaning there is 30 dollars added to what ever the hourly wage is. This can be represented by the +30. Now if "h" represents the variable for which the hourly wage will be calculated, and he pays $45 dollars per hour this will be represented as 45h. <em>As an example if I pay you 2 dollars per hour using the same variable "h", this would be represented as 2h. So if you worked for two hours you would get 4 dollars, this is proven by the fact the 2(2) (remeber im replacing the "h" with the hours you worked) obviously 2 times 2 is 4 proving my point. </em>This information will give you the equation you see above.

B: Onto solving for how much Juan will pay. Now you say youre supposed to have 9 answer but this can't be true. All you need to do is plug the hours given into "h" and solve the equation. It should look something like:

Im using a decimal because it should be clear 1/2=0.5

45x6.5 always go with PEMDAS, we are multiplying first. Then add 292.5 plus 30

This results in the answer of:

3 0

3 years ago

Over the summer, Jackie played video games 3 hours per day. When school began in the fall, she only allowed to play video games

erik [133]

So to find this we divide 3 by 1/2 and get 6. So, she is now only at 1/6 of her original time.1/6 is equal to .1666, and to the nearest percent that would be 17%. hope this helps and its not too late!

3 0

3 years ago