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2 years ago

2x^2-5x-3=0 ? im working on factoring and im not sure how to solve this

Mathematics

2 answers:

Whitepunk [10]2 years ago

3 0

2x²-5x-3 = 0

(2x+1) (x-3) = 0

2x+1 = 0
2x = -1

x = -½

x-3 = 0

x = 3

then x = -½ , x= 3

Elenna [48]2 years ago

3 0

Answer:

$x = - \frac{1}{2}$

$x = 3$

Step-by-step explanation:

hope it helps you

have a wonderful day

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3/4 of the shirts in a store are black. 50% of the shirts are white and the remaining 12 shirts are red. How many black masks ar

saul85 [17]

Answer:

There are total 96 shirts out of which 72 are black and 12 are white and 12 are red.

Step-by-step explanation:

Let the total number of shirts be x.

Then 3/4= 0.75 shirts are black

50% or 50/100 =0.5 of 1/4 ( 1-3/4) remaining are white

and 12 are red

x= 0.75x+0.125x+12

x= 0.875x+ 12

x-0.875x= 12

0.125x= 12

x= 12/0.125

x= 96

There are total 96 shirts out of which 3/4 are black

96*0.75= 72 are black and

96*0.25= 24 are left behind out of which 50% are white.

12 are white and 12 are red.

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3 years ago

Math question please help<br> If you get this right I will mark you as a brainliest

Phoenix [80]

That's an easy parallelogram, parallel to the x axis. Let's label the points

A(-4,-1),B(-2,4),C(4,4),D(2,-1)

AD and BC are the sides parallel to the x axis. We'll call those the base, it has length 4 - -2 = 6.

The height is the change in y between the bases, so 4 - -1 = 5.

The area is base times height, 6 × 5 = 30

Answer: 30

The shoelace formula gives us the area of a polygon from 2D coordinates without worrying about the shape:

(-4,-1),(-2,4),(4,4),(2,-1)

(-2,4),(4,4),(2,-1),(-4,-1)

$A = \frac 1 2 | -4(4) - (-1)(-2) + (-2)(4) - 4(4) + 4(-1) - 4(2) + 2(-1) - (-1)(-4) |$

$A = \frac 1 2 |-60| = 30 \quad \checkmark$

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2 years ago

The sum of 4 consecutive odd integers is –96. Which integers are they

prisoha [69]

Answer:

-27, -25, -23, and -21

Step-by-step explanation:

Let the integers be x, x+2, x+4, x+6.

$x+x+2+x+4+x+6=-96 \\ \\ 4x+12=-96 \\ \\ 4x=-108 \\ \\ x=-27$

So, the integers are -27, -25, -23, and -21.

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1 year ago

The scores on an exam are normally distributed with a mean of 74 and a standard deviation of 7. What percent of the scores are g

muminat

The difference between 81 and the mean is
81 - 74 = 7
This is exactly the value of the standard deviation. You know that the "empirical rule" tells you 68% of all scores lie within 1 standard deviation of the mean. That tells you 32% of all scores lie beyond 1 standard deviation from the mean.

The normal distribution is symmetrical, so half of those (16%) lie above 1 standard deviation above the mean; the other half (16%) lie below 1 standard deviation below the mean. We're only concerned with the first group—those scores above 1 standard deviation above the mean.

The appropriate choice is
D. 16%

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3 years ago

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mixas84 [53]

Answer:

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Step-by-step explanation:

just simple math and a calculator!

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3 years ago