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2 years ago

PLEASE PEOPLE , I NEED HELP CAN YOU HELP ME PLEASE :,)

Mathematics

1 answer:

Tasya [4]2 years ago

3 0

Step-by-step explanation:

= (1 + 5z)(-4)

= (1 + 5z) × (-4)

= 1.(-4) + 5z. (-4)

= -4 - 20z

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Write "five more than a number" as a math expression help please

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Step-by-step explanation:

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2 years ago

A bag has 4 red balls and 4 balls, what is the probability of getting a red ball randomly.

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1/2

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3 years ago

Mia has 40 tens. write how many hundreds. write the number

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3 years ago

A rock is thrown upward with an initial velocity of 16 ft/s from an initial height of 5 ft. How much time does it take for the r

Bogdan [553]

Check the picture below.

so it hits the ground when y = 0, thus

$\bf ~~~~~~\textit{initial velocity}\\\\
\begin{array}{llll}
~~~~~~\textit{in feet}\\\\
h(t) = -16t^2+v_ot+h_o
\end{array} 
\quad 
\begin{cases}
v_o=\stackrel{16}{\textit{initial velocity of the object}}\\\\
h_o=\stackrel{5}{\textit{initial height of the object}}\\\\
h=\stackrel{}{\textit{height of the object at "t" seconds}}
\end{cases}$

$\bf h(t)=-16t^2+16t+5\implies \stackrel{h(t)}{0}=-16t^2+16t+5
\\\\\\
16t^2-16t-5=0\implies (4t+1)(4t-5)=0\\\\
-------------------------------\\\\
4t+1=0\implies 4t=-1\implies t=-\cfrac{1}{4}\\\\
-------------------------------\\\\
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since "t" is seconds it took, it can't be a negative amount.

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3 years ago

What is the area of the composite figure?

Ray Of Light [21]

Answer:

Step-by-step explanation:

The figure is made up of a square with side 4 cm and 3 semicircles of radius 2 cm.

A = area of square + area of 3 semicircles

A = (4 cm)^2 + 3 * (1/2) pi * (2 cm)^2

A = 16 cm^2 + (1/2) 12pi cm^2

A = (6pi + 16) cm^2

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3 years ago