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3 years ago

2x–5 = x+2 ———. ——— 7. 8

Mathematics

1 answer:

Pavel [41]3 years ago

5 0

Answer:

14.8

Step-by-step explanation:

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What number has the same value as 50 tens

Tju [1.3M]

we know that

One ten is equal to $10$

therefore

To find $50$ tens

you must times $50$ by $10$

$50*10=500$

therefore

the answer is

$500$

3 0

3 years ago

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(A-6) to the power of 2 turned into equation

weeeeeb [17]

1) acknowledge the rule that anything that’s outside of the bracket applies to EVERYTHING inside of the bracket
2)apply the rule: (A-6)^2

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3 years ago

Find the unit vector in the direction of u = (-3,2).

DENIUS [597]

$\bf \textit{unit vector for }(a,b)\implies \left( \cfrac{a}{\sqrt{a^2+b^2}}~~,~~\cfrac{b}{\sqrt{a^2+b^2}} \right)\\\\
-------------------------------\\\\
(-3,2)\qquad \stackrel{unit~vector}{\implies }\qquad \left( \cfrac{-3}{\sqrt{(-3)^2+2^2}}~~,~~\cfrac{2}{\sqrt{(-3)^2+2^2}} \right)
\\\\\\
\left( -\cfrac{3}{\sqrt{13}}~~,~~ \cfrac{2}{\sqrt{13}}\right)\\\\
-------------------------------$

$\bf \textit{and now let's \underline{rationalize} the denominator for each}
\\\\\\
-\cfrac{3}{\sqrt{13}}\cdot \cfrac{\sqrt{13}}{\sqrt{13}}\implies -\cfrac{3\sqrt{13}}{13} \qquad \qquad \qquad \qquad \cfrac{2}{\sqrt{13}}\cdot \cfrac{\sqrt{13}}{\sqrt{13}}\implies \cfrac{2\sqrt{13}}{13}
\\\\\\
\textit{and written in \underline{ai+bj form}}\qquad -\cfrac{3\sqrt{13}}{13}i~~~~+~~~~\cfrac{2\sqrt{13}}{13}j$

7 0

3 years ago

Please help. What is the circumference of the circle? <br><br> (X+4)^2+(y-5)^2=81

PIT_PIT [208]

the radius: r^2 = 81

r =9

c = 2*pi*r

= 2 * pi * 9

= 18 *pi

Answer: 18*pi or approximately 56.62

8 0

3 years ago

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Two poles 8m and 13m high

Brilliant_brown [7]

Answer:

13 m

Step-by-step explanation:

<u>The distance x is:</u>

x = √12² + (13 -8)² = √144 + 25 = √169 = 13 m

6 0

3 years ago