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2 years ago

STEP By Step Explaination needed

Mathematics

2 answers:

NeX [460]2 years ago

6 0

Answer:

8/11

Step-by-step explanation:

5+3=8

Veseljchak [2.6K]2 years ago

6 0

Answer:

$\sf\huge\longmapsto \: \frac{8}{11}$

Step-by-step explanation:

$\sf\huge\longmapsto \: \: \frac{5}{11} + \frac{3}{11}$

$\sf\huge\longmapsto \: \frac{5 + 3}{11}$

$\sf\huge\longmapsto \: \frac{8}{11}$

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When a number is increased by 2.8%, the result is 56. What is the original number to

Sever21 [200]

Answer:

The original number was 54.5.

Step-by-step explanation:

If a number is increased by 2.8%, then it is 102.8% of it's original number.

In mathematics, "of" in virtually all cases means "multiplied by".

Therefore, we do the opposite:

1. Convert to a decimal.

102.8% = 1.028

2. Divide by the decimal.

$56 \div 1.028 = 54.47$

3. Round it to the nearest tenth.

54.47 rounds to 54.5.

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3 years ago

Celine is estimating the number of tiles in a mosaic. There are 7 different colors, and 1,1725 tiles of each color. What should

vladimir2022 [97]

There should be about 82,075 tiles.

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3 years ago

G(r)=-(r+11)(r+14) <br><br>what are the zeros & what is the vertex

Nitella [24]

Answer:

The roots (r) or the Zeros ( other name ) = -11 and -14

Step-by-step explanation:

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3 years ago

Five sisters each but matching scarves in two pairs of socks the scores are priced at $12 if the total bill for all five sisters

Illusion [34]

Answer:

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3 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

3 years ago