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3 years ago

HELP!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

borishaifa [10]3 years ago

4 0

Multiplying factors with exponents means you can add the exponents.

So $2^{4} \cdot 2^{-7} = 2^{4-7} = 2^{-3}$

A negative exponent becomes positive when you move it to the denominator, so:

$2^{-3} = \frac{1}{ 2^{3} }$

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Find the coordinates of the midpoint of line AB given the coordinates: A(-1,<br> 5) B(2,-3)*<br>

Naily [24]

Answer:

$\bold{M_{AB}\left(\frac12\,,\ 1\right)}$

Step-by-step explanation:

The midpoint of AB coordinates are: $M_{AB}\left(x_M\,,\ y_M\right)$ where:

$x_M=\frac{x_A+x_B}2=\frac{-1+2}2=\frac12\\\\y_M=\frac{y_A+y_B}2=\frac{5+(-3)}2=\frac{2}2=1$

6 0

4 years ago

Solve:<br> (1 1/3) 24 = 32<br> b: 875 + 61/2=<br> 1/2x + 31/2y=<br> 91/5x +91/5= <br> Please help me

In-s [12.5K]

Answer:

875 + 61/2= 1811/2

1/2x + 31/2y= y + 31x/2xy

91/5x +91/5= 91 + 91x/5

Step-by-step explanation:

I did not understood the question but I hope thet was the Answer

3 0

3 years ago

Point X lies on plane S and on plane R. True or false?

Naya [18.7K]

The answer is true.

Point X lies on the line of intersection of planes S and R. This means that point X lies on both plane S and plane R at the same time.

You could also try and imagine the diagram without plane S and see that point X lies on plane R. Then you can imagine the same diagram without plane R and see that point X lies on plane S.

Let me know if you need any clarifications, thanks!

~ Padoru

8 0

3 years ago

Please solve x/2 > -4

andriy [413]

<h3>Answer: x > -8</h3>

Multiply both sides by 2 so that you go from

x/2 > -4

x > -8

The inequality sign will not flip since we are not multiplying both sides by a negative number.

If you are curious how to graph the solution, draw out a number line and plot an open unfilled circle at -8. Then shade to the right of the open circle. The open circle says "do not include this value as part of the solution set". The solution set is shaded representing all of the values larger than -8 (which make the original inequality true).

3 0

4 years ago

A boy is twice as tall as his little sister and 30cm shorter than his father. Their combined height is 3.8 meters. Find (in cm)

goldenfox [79]

Answer:

Call the sister's height x. The boy is twice as tall, so that's 2x. The father is 30 cm taller than the boy, so his height is 2x + 30. The combined height is 3.8m, which is 380cm. Now you can write an equation

x + 2x + 2x + 30 = 380

collect like terms

5x = 350

x = 70

the sister is 70cm tall, the boy is 2*70 = 140 cm, and the father is 140 + 30 = 170cm

Check that the heights add up to 3.8m: 70 + 140 + 170 = 380 cm = 3.8m. Correct

Step-by-step explanation:

hope it helps

5 0

3 years ago