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3 years ago

What is the sum of -2 and -7

Mathematics

2 answers:

shutvik [7]3 years ago

8 0

Answer: -9

Step-by-step explanation:

Serga [27]3 years ago

6 0

-2-7 is equal to -9

hope this helps

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Please help me please help me please help me please help me please help me please help me please

Serga [27]

Answer:

first one is square root

don't know the second tho

4 0

2 years ago

12 ft<br> 8 ft<br> 8 ft<br> Find the area of the kite.

mamaluj [8]

I’m not sure but I’m guessing it could be 8 ft

4 0

3 years ago

Read 2 more answers

Determine if the statement is always, sometimes or never true. There are 300 degrees in the sum of the interior angles of a poly

Marrrta [24]

Answer:

Never

Step-by-step explanation:

Using the formula to find the sum of the interior angles, (n-2) * 180, we can work backwards.

300/180 +2 = 11/3 or 3.666. Polygons cannot have decimal sides therefore your answer is never.

6 0

3 years ago

If a triangle has an area of 192 mm2, and the

Debora [2.8K]

Answer:32mm

Step-by-step explanation:

area of triangle = 1/2 *base * height

192mm2 = 1/2 *b* 12mm

192 =6b

base=192/6

base= 32mm

3 0

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

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

$\bf h(t)=-16t^2+16t+5\implies \stackrel{h(t)}{0}=-16t^2+16t+5
\\\\\\
16t^2-16t-5=0\implies (4t+1)(4t-5)=0\\\\
-------------------------------\\\\
4t+1=0\implies 4t=-1\implies t=-\cfrac{1}{4}\\\\
-------------------------------\\\\
4t-5=0\implies 4t=5\implies t=\cfrac{5}{4}\implies \boxed{t=1\frac{1}{4}}$

since "t" is seconds it took, it can't be a negative amount.

5 0

3 years ago