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Mashcka [7]
3 years ago
6

Jon reads 25 pages in 30 minutes. If Jon reads 200 pages at this same rate, how long will it take him?

Mathematics
1 answer:
kupik [55]3 years ago
5 0
It will take Jon 240 minutes or 4 hours.
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Heather and allison weigh 123 pounds together.If heather weighs 61.25 how much does allison weigh​
Rufina [12.5K]

123-61.25=61.75. Allison weighs 61.75 pounds.

7 0
3 years ago
Describe the nature of the roots for this equation
vitfil [10]

First, fint the roots of the equation 2x^2+5x-7=0.

1.

D=5^2-4\cdot 2\cdot (-7)=25+56=81,\\\sqrt{D}=\sqrt{81}=9,\\ \\x_1=\dfrac{-5-9}{2\cdot 2}=-\dfrac{14}{4}=-3.5,\\ \\x_2=\dfrac{-5+9}{2\cdot 2}=\dfrac{4}{4}=1.

2. You can see that this equation has two different real roots. Note that you can make this statement without finding roots, only knowing the value of discriminant: since D=81>0, then the equation has two different real roots.

5 0
3 years ago
Rachel is solving the system of equations. {7x-21y =14 and 2x+3y=11}. Using the elimination method. which of the following steps
sleet_krkn [62]
Well you see here your answer to this very frantically asked question would grammatically be the answer that you would get to this equation. Hoped i helped!!
4 0
2 years ago
The solution to a system of two linear equations is (4, -3). One equation has a slope of 4. The slope of the other line is the n
astraxan [27]

Answer:

Hello,

First equation is false

Second equation is true

Step-by-step explanation:

1)

(4,-3) is a point of the line y=4x-19  since

-3=?4*4-19

-3=-3

2)

(4,-3) is not a point of the line y=1/4x-2 since

-3=? 1/4*4-2

-3=? 1-2

-3≠-1

I have written that because it is difficult for me to understand

"the negative reciprocal of the slope of the first"

the negative reciprocal of 4 should be -1/4.

Equation y=1/4x-2 is false.

5 0
3 years ago
Use the parabola tool to graph the quadratic function. f(x)=2x^2 +12x+16 Graph the parabola by first plotting its vertex and the
givi [52]
(-3, -2) is the vertex. 

You can find this by plugging into -b/2a to find the x value and using the x value to find the y value. 

And another spot on the vertex would be (0, 16), which is the y intercept. 
8 0
2 years ago
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