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MrRa [10]
3 years ago
5

Simplify the expression: 5+a+7a+1

Mathematics
2 answers:
drek231 [11]3 years ago
8 0

Answer:

13+2a

Step-by-step explanation:

5+7+1 is 13. a +a is 2 a. Therefore, the answer is 13+2a!

sergeinik [125]3 years ago
3 0
13+a


5+7+1 is eight (8) and the a is the same variable so you just out them together
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Each bowling ball weighs 7.3*10^3 grams. The bowling alley has 2.0*10^2 bowling balls. How much do they all weigh, combined? Exp
Alexandra [31]

Answer:

1.46 x 10⁶g

Step-by-step explanation:

Given parameters:

Weight of each bowling ball  = 7.3 x 10³g

Number of balls in the bowling alley = 2.0 x 10²bowling balls

Unknown

The weight of the balls in the alley  = ?

Solution:

To find the weight of the balls in the alley, multiply the mass of each balls with the total number of balls;

 Weight of the balls = 7.3 x 10³ x 2.0 x 10²

 Weight of the balls  = (7.3 x 2.0) x 10³⁺²

 Weight of the balls  = 14.6 x 10⁵g

 Therefore, the weight of the balls  = 1.46 x 10⁶g

3 0
3 years ago
HELP PLEASE SOON!
kirill115 [55]
1.\\\\\bold{v_1}=\langle2,4\rangle\qquad\bold{v_2}=\langle-1,5\rangle\\\\
\bold{v_1}\circ\bold{v_2}=2\cdot(-1)+4\cdot5=-2+20=18\qquad [\text{C}]\\\\\\
2.\\\\
\bold{v_1}= \langle2, 5\rangle\qquad \bold{v_2}= \langle4, -3\rangle\\\\\\
\bold{v_1}\circ\bold{v_2}=2\cdot4+5\cdot(-3)=8-15=-7\\\\||\bold{v_1}||=\sqrt{2^2+5^2}=\sqrt{4+25}=\sqrt{29}\\\\
||\bold{v_2}||=\sqrt{4^2+(-3)^2}=\sqrt{16+9}=\sqrt{25}=5\\\\\\


\cos\Theta=\dfrac{\bold{v_1}\circ\bold{v_2}}{||\bold{v_1}||\cdot||\bold{v_2}||}=\dfrac{-7}{5\cdot\sqrt{29}}\\\\\\
\cos\Theta=-\dfrac{7}{5\sqrt{29}}\quad\implies\quad\Theta=\arccos\left(-\dfrac{7}{5\sqrt{29}}\right)\\\\\\\boxed{\Theta\approx105,1^\circ}
7 0
4 years ago
Read 2 more answers
How to solve 8x + 7= 31 step by step
Masteriza [31]

Answer:

3

Step-by-step explanation:

8x + 7 = 31                      Subtract 7 from both sides

  <u>   -7      -7</u>

8x =       24                    Divide by 8

8x/8  =   24/8

x = 3

3 0
3 years ago
Read 2 more answers
5,687.3 mi to the nearest mile
beks73 [17]
5687.3 to the nearest mile is 5,687 miles

Because the number directly to the right of ur 7 is a 3....and since it is below 5, ur whole number stays the same....if that number would have been a 5 or above, u would have rounded ur whole number up 1 making it 5688.


7 0
3 years ago
Surface area for this 4height 4lenght 6 width
xenn [34]

Answer:

64

Step-by-step explanation:

4 * 4 * 6 =  64

5 0
3 years ago
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