All of the answer choices that you are given are incorrect. I have calculated it in all different ways and get the same thing and it is none of those. The correct answer would be -75 though.

7 0

2 years ago

hi I was just a little bit of time with my module and I didn't know what is answer of the module now please please be sure of th

GREYUIT [131]

1. 5 x 4 = A. 20

$\frac{2}{5} \times 25 = 2 \times 5 = 10$

the answer is D. 25

$\frac{3}{5} \div 15 = \frac{3}{5} \times \frac{1}{15} = \frac{1}{5} \times \frac{1}{5} = \frac{1}{25}$

the answer is A. 1/25

$4 \div \frac{1}{2} = 4 \times \frac{2}{1} = 8$

the answer is C. 8

$9 \div \frac{1}{3} = 9 \times \frac{3}{1} = 27$

the answer is D. 27

$20 \div \frac{1}{4} = 20 \times \frac{4}{1} = 80$

the answer is D. 80

$\frac{9}{10} \div \frac{1}{2} = \frac{9}{10} \times \frac{2}{1} = \frac{18}{10} = \frac{9}{5} = 1 \frac{4}{5}$

the answer is C. 1 4/5

$9 \div \frac{3}{2} = 9 \times \frac{2}{3} = \frac{18}{ 3} = 6$

the answer is B. 6

$\frac{3}{4} \div \frac{3}{8} = \frac{3}{4} \times \frac{8}{3} = 2$

the answer is A. 2

3 0

2 years ago

Find the discriminant and the number of real roots for this equation.

Margaret [11]

Our discriminant is 0 so, $4x^2 + 12x + 9 = 0$ has one real root.

Option C is correct.

Step-by-step explanation:

we need to find the discriminant and the number of real roots for the following equation:

$4x^2 + 12x + 9 = 0$

The discriminant is found by using square root part of quadratic formula:

$b^2-4ac$

where b =12, a=4 and c=9

Putting values:

$=b^2-4ac\\=(12)^2-4(4)(9)\\=144-144\\=0$

To find out the number of real roots using discriminant we have following rules:

if discriminant b^2-4ac >0 then 2 real roots
if discriminant b^2-4ac =0 then 1 real root
if discriminant b^2-4ac <0 then no real roots

Since our discriminant b^2-4ac is 0 so, $4x^2 + 12x + 9 = 0$ has one real root.

Option C is correct.

Keywords: discriminant

Learn more about discriminant at:

#learnwithBrainly

6 0

2 years ago