3 years ago

I need help on #'s 2,3,5, and 9 due tomorrow

Mathematics

1 answer:

Mashcka [7]3 years ago

8 0

This is so blurry, can you take another picture or type the questions out please/

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What are the roots of the quadratic equation 2x2+7x+4=0? Select all that apply.

skad [1K]

Answer:

option A and B

$x=\frac{-7+\sqrt{17}} {4}$

and

$x=\frac{-7-\sqrt{17}} {4}$

Step-by-step explanation:

we have

$2x^2+7x+4=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$2x^2+7x+4=0$

$a=2\\b=7\\c=4$

substitute in the formula

$x=\frac{-7\pm\sqrt{7^{2}-4(2)(4)}} {2(2)}$

$x=\frac{-7\pm\sqrt{17}} {4}$

$x=\frac{-7+\sqrt{17}} {4}$

and

$x=\frac{-7-\sqrt{17}} {4}$

7 0

3 years ago

The fit line equation is Y = -2.61x +152.51, where x is variable 1 and Y is variable 2. According to the equation, what is the e

egoroff_w [7]

The expected value of y when x is equals to 45 in the equation is 35.06

<h3>How to find variable from an equation?</h3>

The equation is given as follows;

y = -2.61x + 152.51

where

x = variable 1
y = variable 2

Therefore,

when

x = 45

y = -2.61x + 152.51

y = -2.61(45) + 152.51

y = - 117.45 + 152.51

y = 35.06

learn more on equation here: brainly.com/question/14279419

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2 years ago

A farmer sold 54 pumpkins the first weekend of a fall festival and 42 pumpkins the second weekend. Which expression uses the dis

malfutka [58]

?-54-42=?
I hoped this helped

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3 years ago

1 4/5 miles - 5/6 mile=

aleksandr82 [10.1K]

14/5-5/6=84/30-25/30=59/30

59/30=1 and 29/30

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3 years ago

a customer buys $12.42 in merchandise and gives the cashier a ten dollar bill, a five dollar bill, a dime, a nickel and two penn

Dmitry [639]

Her correct change would be $2.75 cents, to get this answer, just subtract 12.42 from 15.17
Hope this helped you!! ( :

4 0

3 years ago

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