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IRISSAK [1]
3 years ago
6

the earths diameter through the equator is about 8,000 what is the earths estimated diameter written as a whole number multiplie

d by a power of ten​

Mathematics
1 answer:
Sauron [17]3 years ago
7 0

Answer:

To write 8000 miles in scientific notation, first find a natural number between 1 and 10.     (8)  

Now, figure out how many decimal places we have to move to the left.

8000.0 --> 8.0000        (Three )

Now, write the number 8 multiplied by 10 to the third power.

( 8 × 10^3 miles )

Step-by-step explanation:

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For what value of X must the quadrilateral be a parallelogram X +5 equals 2X -5
melomori [17]

Answer:

x=10

Step-by-step explanation:

x+5=2x-5

x=2x-10

-x=-10

x=10

4 0
3 years ago
Can you pleassesesesseseesese help me
siniylev [52]

Sry just add a triangle on each side took that test

8 0
3 years ago
What is the solution set of this system of equations? y=x2−7 y=−x+5 The solution set of a system of equations is the set of all
iogann1982 [59]

Answer:

The answer to your question is (-4, 9) and (3, 2)

Step-by-step explanation:

Data

Equation 1    y = x² - 7

Equation 2   y = -x + 5

Process

1.- Substitute Equation 2 in equation 1

                    -x + 5 = x² - 7

2.- Equal to zero

                    x² + x - 7 - 5 = 0

                    x² + x - 12 = 0

3.- Factor to find x

                   (x + 4)(x - 3) = 0

                x₁ + 4 = 0        x₂ - 3 = 0

                x₁ = -4             x₂ = 3

4.- Substitute x₁ and x₂ to find y

                y = -x + 5        x₁ = -4

                y = -(-4) + 5

                y = 4 + 5

                y = 9            Solution (-4, 9)

                y = -x + 5         x₂ = 3

                y = -3 + 5

               y = 2            Solution (3, 2)

                     

             

7 0
3 years ago
the first term of a arithmetic sequence is 2 and the 4th term is 11, how do I find the sum of the first 50 terms
Rama09 [41]
\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
a_1=2\\
a_4=11\\
n=4
\end{cases}
\\\\\\
a_4=2+(4-1)d\implies 11=2+(4-1)d\implies 11=2+3d
\\\\\\
9=3d\implies \cfrac{9}{3}=d\implies \boxed{3=d}\\\\
-------------------------------\\\\

\bf \textit{now, what's the 50th term anyway?}
\\\\\\
n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
a_1=2\\
n=50\\
d=3
\end{cases}
\\\\\\
a_{50}=2+(50-1)3\implies a_{50}=2+147\implies a_{50}=149\\\\
-------------------------------\\\\

\bf \textit{sum of a finite arithmetic sequence}\\\\
S_n=\cfrac{n}{2}(a_1+a_n)\quad 
\begin{cases}
n=50\\
a_1=2\\
a_{50}=149
\end{cases}\implies S_{50}=\cfrac{50}{2}(2+149)
7 0
4 years ago
Which facts are true for the graph of the function below? Check all that apply.
Reika [66]

Answer:

B. It is decreasing function

D.The y- intercept is (0,1)

F.The range of F(x) is y > 0

Step-by-step explanation:

We are given that a function

f(x)=(\frac{3}{7})^x

We have to find the facts which are true about the graph of the given function.

Substitute x=0 then, we get

f(x)=(\frac{3}{7})^0=1 because (a^0=1)

Therefore, y- intercept  is (0,1).

It is defined for all real number .Therefore, domain of given function is all real numbers .

Domain of F(x)=R

Range of F(x):y >0

lim_{x\rightarrow\infty)(\frac{3}{7})^x=0

\lim_{x\rightarrow-\infty}(\frac{3}{7})^x=\infty

Hence, it is decreasing function.

Answer:B. It is decreasing function

D.The y- intercept is (0,1)

F.The range of F(x) is y > 0

5 0
4 years ago
Read 2 more answers
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