4 years ago

Using Quadratic Equations to Solve Problems:

Mathematics

1 answer:

satela [25.4K]4 years ago

3 0

Answer:

Step-by-step explanation:

Let x represent the number. The problem statement tells us ...

10x² = 40x

x = 4 . . . . . . . divide by 10x

the number is 4. Hope that helps love!

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What is the maximum of the numbers listed below?<br> 5.2, 5.4, 4.9, 4.4, 5.1

alexgriva [62]

Answer:

5.4

Step-by-step explanation:

5.2, 5.4, 4.9, 4.4, 5.1

4.4, 4.9, 5.1, 5.2, 5.4

5.4 is the maximum

Hope this helped!

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3 years ago

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A pound of chocolate costs 7 dollars. Joe buys p pounds. Write an equation to represent the total cost c that Joe pays.

pickupchik [31]

Answer:

Total cost, c = 7p

Step-by-step explanation:

1pound =$7

Joe buys p pounds,

p pounds = $7 * p

p pounds = 7p

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3 years ago

The table gives some information about the heights of 30 plants.

kati45 [8]

The answer would be c

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3 years ago

Hich values are solutions to the inequality?

Troyanec [42]

$2r\leq3r-8\\0\leq r-8\\8\leq r\\r\geq8$

So, in the list of numbers, 8 and 9 are solutions

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3 years ago

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Solve by using the quadratic formula.<br> 3psquared+7p+2=0

Rainbow [258]

Answer:

$\large\boxed{x=-2\ or\ x=-\dfrac{1}{3}}$

Step-by-step explanation:

The quadratic formula of a quadratic equation

$ax^2+bx+c=0\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

We have the equation:

$3p^2+7p+2=0\to a=3,\ b=7,\ c=2$

Substitute:

$b^2-4ac=7^2-4(3)(2)=49-24=25\\\\\sqrt{b^2-4ac}=\sqrt{25}=5\\\\x_1=\dfrac{-7-5}{2(3)}=\dfrac{-12}{6}=-2\\\\x_2=\dfrac{-7+5}{2(3)}=\dfrac{-2}{6}=-\dfrac{1}{3}$

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3 years ago

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