3 years ago

Seriously need help!!????

Mathematics

1 answer:

Serga [27]3 years ago

3 0

50 would be a good choice of answer

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Decide which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring.

JulijaS [17]

Answer:

a) $b^2-4ac$

b) 25

Step-by-step explanation:

a) The quadratic formula is $x=\frac{-b\pm \sqrt{b^2-4ac} }{2a}$ .

The portion under the radical sign ( $b^2-4ac$ ) is called the discriminant or determinant.

It tells us that, the quadratic equation can be solved by factoring, if its value is a perfect square.

b) The given quadratic equation is $2x^2+7x+3=0$ .

By comparing to $ax^2+bx+c=0$ , we have a=2, b=7, and c=3

We substitute these values to get:

$b^2-4ac=7^2-4(2)(3)$

$b^2-4ac=49-24$

$b^2-4ac=25$

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3 years ago

You roll a fair 6 sided die what is the probability you roll a 1 or 3?

Elenna [48]

2/6 I hope this helps!

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3 years ago

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Find the area 5 3 EN square units Stuck? Watch a video or use hint

kkurt [141]

Answer:

your answer will be 18 square units

Step-by-step explanation:

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2 years ago

Andrew sold 60 baseball cards to a friend . This was 80% of Andrews total baseball card collection. How many total baseball card

svetlana [45]

Answer:

Step-by-step explanation:

We know that 80% of Andrew's (former) baseball card collection is 60. Thus, We divide 60 by 80% (equal to 0.8) to obtain $\frac{60}{0.8}=75$ .

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3 years ago

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1. A researcher collected data from car shoppers about their favorite car color. He asked 250 people about their favorite vehicl

hichkok12 [17]

Answer:

(a) 2% (b) 15

Step-by-step explanation:

(a):

80 - blue (32%)

60 - white (24%)

50 - red (20%)

45 - black (18%)

10 - silver (4%)

Total: 245

5 - other (2%)

(b):

60 - white

45 - black

Difference: 15

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3 years ago