2 years ago

Select the correct answer.

Mathematics

1 answer:

dolphi86 [110]2 years ago

3 0

Check the picture below.

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Round up to the nearest hundredth

Shalnov [3]

$x^2+3x-5=0\\\\a=1;\ b=3;\ c=-5\\\\b^2-4ac=3^2-4\cdot1\cdot(-5)=9+20=29\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\x_1=\dfrac{-3-\sqrt{29}}{2\cdot1}=\dfrac{-3-\sqrt{29}}{2}\approx-4.19\\\\x_2=\dfrac{-3+\sqrt{29}}{2\cdot1}=\dfrac{-3+\sqrt{29}}{2}\approx1.19$

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3 years ago

A national survey of middle school students asks how many hours of sleep they get on school nights. Which sample best represen

mariarad [96]

Answer:

Step-by-step explanation:

It wouldnt be a single grade being surveyed so we would choose d in additon a and b isnt national since it says 'in a certain town' and 'in a certain county'.

Which leaves you with D.

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2 years ago

The product of 9 and the quantity 5 more than a number t is less than 5

Lelechka [254]

$9(t+5) \ \textless \ 5\ \ \ |use\ distributive\ property:a(b+c)=ab+ac\\\\(9)(t)+(9)(5) \ \textless \ 5\\\\9t+45 \ \textless \ 5\ \ \ |subtract\ 45\ from\ bot\ sides\\\\9t \ \textless \ -40\ \ \ \ |divide\ both\ sides\ by\ 9\\\\\huge\boxed{t \ \textless \ -\dfrac{40}{9}\to t \ \textless \ -4\dfrac{4}{9}}$

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3 years ago

Anyone knows about this ?.

solniwko [45]

Answer: nope

Step-by-step explanation:

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3 years ago

What are 3 other names for the solutions to a quadratic function

pashok25 [27]

Zeros, roots, solutions, and solution sets are all 4 names

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