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3 years ago

10

PLEASE HELP MATH 11. And 12.

1 answer:

Serggg [28]3 years ago

6 0

i Don't know the answer is true or not..but i try my best

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Please can you answer it because I need the answer

andre [41]

Answer:

For x^2 + 5x - 14 = 0

x1= -7, x2 = 2

For x^2 + 5x + 6 = 0

x1 = -3, x2 = -2

Step-by-step explanation:

Pls see attached....

7 0

3 years ago

Find the difference between8/15 and 2/3 Show all calculations in your final answer.

kherson [118]

Answer:

$\frac{8}{15}-\left(\frac{-2}{3}\right)=\frac{6}{5}$

Step-by-step explanation:

Let the value of a number 'a' be = 8/15

Let the value of a number 'b' be = 2/3

The difference between the two numbers can be calculated by subtracting the numbers

$a-b=\frac{8}{15}-\left(\frac{-2}{3}\right)$

$\mathrm{Remove\:parentheses}:\quad \left(a\right)=a$

$=\frac{8}{15}-\frac{-2}{3}$

$\mathrm{Apply\:the\:fraction\:rule}:\quad \frac{-a}{b}=-\frac{a}{b}$

$=\frac{8}{15}-\left(-\frac{2}{3}\right)$

$\mathrm{Apply\:rule}\:-\left(-a\right)=a$

$=\frac{8}{15}+\frac{2}{3}$

$\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$=\frac{8+10}{15}$

$=\frac{18}{15}$

$\mathrm{Cancel\:the\:common\:factor:}\:3$

$=\frac{6}{5}$

Thus,

$\frac{8}{15}-\left(\frac{-2}{3}\right)=\frac{6}{5}$

3 0

3 years ago

Please help Asap will mark (Brainliest)

nadezda [96]

Answer: The area of the notebook that the sticker covers is 128 cm^2

Step-by-step explanation:

The equation for the area of a rectangle should be:

$A=bh$

-The height of the stickers measures 16 cm:

$height = 16cm$

-So, if the base is half as long as the height, you divide it by 2:

$base=\frac{16}{2}=8cm$

-Then, you substitute it:

$A=16$ · $8$

-Result:

$128cm^2$

5 0

2 years ago

A meteorologist forecasted that Monday's high temperature would be 76°F. On Monday, the temperature reached 80°F. What is the pe

gtnhenbr [62]

Answer:

5 % error

see the solution

3 0

3 years ago

Read 2 more answers

There are 13 boys and 10 girls in the classroom.what is the ratio of boys and girls

SIZIF [17.4K]

Answer:Step-by-step explanation: 13:10

3 0

3 years ago