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3 years ago

15

A spider is trying to climb a wall that is 15 metres high. In each hour, it climbs up 3 metres, but falls back 2 metres. In how

many hours will it reach the top of the wall?

1 answer:

Eva8 [605]3 years ago

4 0

In 15 hours

That or 13 hours, if we don’t include the fall back for the last one tho I highly doubt that so go with 15

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14. Janie Christopher lent $6000 to a friend for 90 days at 12%. After 30 days, she sold the note to a third party for $6000. Wh

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2 years ago

Evaluate the expression 14[x(2y+3z)] when x = 8, y = 3, and z = 2

devlian [24]

Answer:

i think the anser is 150 sorry if im wrong

Step-by-step explanation:

2x2x2= 8

3x3= 9

8+9= 17x8= 136+14= 150

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2 years ago

What is the best estimate for the area of circle A, in square units? Use the approximation “pie”≈3.14.

amm1812

Answer:

153.86 un²

Step-by-step explanation:

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Area circle = 3.14(7)²

Area circle = 3.14 * 49 = 153.86

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7 0

3 years ago

Read 2 more answers

The relative locations of Marilyn's house, Bobby's house, and Kimberly's house are shown in the figure.

EastWind [94]

<span>Using sine rule :

</span> $\dfrac{a}{sin A} = \dfrac{b}{sin B}$
<span>
</span> $\dfrac{14}{sin(63)} = \dfrac{b}{sin(50)}$
<span>
</span> $bsin(63) = 14sin(50)$
<span>
</span> $b = \dfrac{14sin(50)}{sin(63) }$
<span>
</span> $b = 12.04 \ mi \text{(nearest hundredth)}$
<span>
Answer: The distance is 12.04 miles</span>

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3 years ago

A line segment has endpoints (-2,-3) and (4,4). Find the length of the segment and find the midpoint.

uysha [10]

$\bf ~~~~~~~~~~~~\textit{distance between 2 points}
\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~ -2 &,& -3~) 
% (c,d)
&&(~ 4 &,& 4~)
\end{array}
\\\\\\
d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}
\\\\\\
d=\sqrt{[4-(-2)]^2+[4-(-3)]^2}\implies d=\sqrt{(4+2)^2+(4+3)^2}
\\\\\\
d=\sqrt{36+49}\implies \boxed{d=\sqrt{85}}\\\\
-------------------------------$

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points }
\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~ -2 &,& -3~) 
% (c,d)
&&(~ 4 &,& 4~)
\end{array}\qquad
% coordinates of midpoint 
\left(\cfrac{ x_2 + x_1}{2}\quad ,\quad \cfrac{ y_2 + y_1}{2} \right)
\\\\\\
\left( \cfrac{4-2}{2}~~,~~\cfrac{4-3}{2} \right)\implies \left(\cfrac{2}{2}~~,~~\cfrac{1}{2} \right)\implies \boxed{\left(1~,~\frac{1}{2} \right)}$

5 0

3 years ago