3 years ago

I need help relearning inequalities

Mathematics

1 answer:

Leto [7]3 years ago

7 0

This is an example of how you solve an inequality.

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the length of a rectangle is 5 ft more than the width. The. Is 22 ft. Find the width of a rectangle.

musickatia [10]

Answer:

To the tenth = 2.8

Step-by-step explanation:

x*(x+5) = 22

2.8 * (2.8 + 5) = about 22

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2 years ago

What’s the median of the data on the dot plot? HELP ITS DUE IN ONE HOUR

patriot [66]

Answer:

It is 1.5

Step-by-step explanation:

{0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 4, 4, 11}

the middle two are 1 and 2.

the mean of 1 & 2 is 1.5 now you have the median!

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2 years ago

F(x) = 4x^2 - 3x + 2kx + 1

dybincka [34]

$f(x)=4x^2-3x+2kx+1=4x^2+(2k-3)x+1\\\\a=4;\ b=2k-3;\ c=1\\\\function\ has\ two\ zeros\ when\ \Delta=b^2-4ac > 0\\\\\Delta=(2k-3)^2-4\cdot4\cdot1=4k^2-12k+9-16=4k^2-12k-7 > 0\\\\a_k=4;\ b_k=-12;\ c_k=-7\\\\\Delta_k=(-12)^2-4\cdot4\cdot(-7)=144+112=256\\\\k_1=\frac{-b_k-\sqrt{\Delta_k}}{2a_k};\ k_2=\frac{-b_k+\sqrt{\Delta_k}}{2a_k}$

$\sqrt{\Delta_k}=\sqrt{256}=16\\\\k_1=\frac{12-16}{2\cdot4}=\frac{-4}{8}=-\frac{1}{2};\ k_2=\frac{12+16}{2\cdot4}=\frac{28}{8}=\frac{7}{2}\\\\a_k=4 > 0\ (up\ parabola\ arms-see\ the\ picture)\\\\Answer:k\in(-\infty;-\frac{1}{2})\ \cup\ (\frac{7}{2};\ \infty)$

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2 years ago

HELP PLEASE! if a||b what is the value of x?

Norma-Jean [14]

Answer: x=30 (Sorry for wasting your time if the answer is wrong)

Step-by-step explanation:

I did it the lazy way

80-20=60

60÷2=30

(If this is completely wrong then again, sorry)

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3 years ago

Now that the party is over, it’s time to help your friend write the thank you notes. You have $24 to purchase and mail 32 thank

Tasya [4]

0.75 Jordan went to the pond and died soon

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3 years ago