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3 years ago

7(8+x+2) equals what exactly i dont know

Mathematics

2 answers:

Helga [31]3 years ago

7 0

Answer: 70+7x

Step-by-step explanation:

56 +7x+14 (multiply 7 with all the numbers and x in the parenthesis)

Add 56+14=70

Than you will get the answer of 70+7x

And if you can plz help me on my science hw thank you so much because it’s due in a couple hours and I don’t understand it!

Nataly [62]3 years ago

4 0

Answer:

70 + 7x

Step-by-step explanation:

7(8+x+2)

Combine like terms in the parenthesis

7(8+2+x)

7(10+x)

Distribute

70 + 7x

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The sum of 3x^2 -8x -2 and 4x -2 is?

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3x^2−4x−4

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3x^2−8x−2+4x−2

=3x^2+−8x+−2+4x+−2

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=(3x^2)+(−8x+4x)+(−2+−2)

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Step-by-step explanation:

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A = randomly selected person is a student

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$P(A)=\dfrac{100}{125}=\dfrac{4}{5}=0.8\\ \\P(B|A)=\dfrac{80}{85}=\dfrac{16}{17}\approx 0.94$

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3 years ago

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(3x+4)^2=14 what are the solutions?

kherson [118]

$\bf (3x+4)^2=14\implies \sqrt{(3x+4)^2}=\pm\sqrt{14}\implies 3x+4=\pm\sqrt{14}
\\\\\\
3x=\pm \sqrt{14}-4\implies x=\cfrac{\pm \sqrt{14}-4}{3}\implies x=
\begin{cases}
\cfrac{\sqrt{14}-4}{3}\\\\
\cfrac{- \sqrt{14}-4}{3}
\end{cases}$

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3 years ago

The answer to this word problem usinf discriminant

solniwko [45]

$\bf h=-9.8t^2+45t+1.2\implies 64.5=-9.8t^2+45t+1.2
\\\\\\
0=-9.8t^2+45t-63.3\\\\
-------------------------------$

$\bf \qquad \qquad \qquad \textit{discriminant of a quadratic}
\\\\\\
0=\stackrel{\stackrel{a}{\downarrow }}{-9.8}t^2\stackrel{\stackrel{b}{\downarrow }}{+45}t\stackrel{\stackrel{c}{\downarrow }}{-63.3}
~~~~~~
\stackrel{discriminant}{b^2-4ac}=
\begin{cases}
0&\textit{one solution}\\
positive&\textit{two solutions}\\
negative&\textit{no solution}
\end{cases}
\\\\\\
(45)^2-4(-9.8)(-63.3)\implies -456.36$

the discriminant is a negative value, thus no solution for such quadratic, meaning if we use h=64.5 like we did, there's no "t" seconds at which point the ball hits the batting cage.

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3 years ago

7(8+x+2) equals what exactly i dont know ​

7(8+x+2) equals what exactly i dont know