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3 years ago

Will mark brainliest if correct (surface area question)

Mathematics

1 answer:

I am Lyosha [343]3 years ago

6 0

Answer:

535

Step-by-step explanation:

8 x 7 = 56

15 x 17 = 255 . 255 / 2 = 127.5

15 x 7 = 105

17 x 7 = 119

119 + 105 + 127.5 + 127.5 + 56 = 535

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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

36 is 0.9% of what number

algol13

400
because you need to divide 36/0.09=400

8 0

3 years ago

Pls help me with it!!!!!!

Eddi Din [679]

Answer:

I dont really know but I can tell you for sure its one of the first 2

Step-by-step explanation:

3 0

3 years ago

In a company, 85% of the workers are men. If 360 people work for the company who aren't men, how many workers are there in

geniusboy [140]

If 85% are men, then (100 - 85), 15% are not men

so, 15% are not men which means that 15% are 360 = 15% of x = 360

(x = total no. of workers)

so, x = 360 × $\frac{100}{15}$ = 2400

The total number of people = <em><u>2400</u></em>

<em><u>( </u></em><em>sorry I didn't use pencil...</em><em><u>)</u></em>

4 0

3 years ago

How many different three-letter initials are there that contain at least one a?

snow_tiger [21]

I believe the answer is 600

4 0

3 years ago

Read 2 more answers