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2 years ago

Easy points

Mathematics

2 answers:

VLD [36.1K]2 years ago

8 0

<h2>Solution:</h2>

<h3>Your age: 6 years</h3><h3>Brothers age: half of your age</h3>

So when you are 6 your brother is 3
Now we have got the difference between your age and your brother's age which is 3 years..

<h3>Your brother will be 70-3=67 years old when you will be 70.</h3>

Finger [1]2 years ago

3 0

Their brother will be 67 years old because when they were six their brother was 3. They were three years apart.

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What is the value of x in the equation 7k-5x=2/3x(ax-6)

olga55 [171]

Firstly, you have to isolate the X on one side if the equation by doing that you have to divide the numbers that are on the same side of the equation as part of the X.

4 0

3 years ago

Help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

ahrayia [7]

Answer:

9. x=-6, y=0

10. x=-9, y=-10

11. x=3, y=-1

Step-by-step explanation:

$2x-9y=-12\\3x+18y=-18$

Multiply the first equation by 2.

$4x-18y=-24\\3x+18y=-18$

Add the equations.

$7x=-42$

$x=-6$

We figured out x now we have to figure out y. To figure out y plug in x into any equation.

$2(-6)-9y=-12$

$-12-9y=-12$

$-9y=0$

$y=0$

Your answer is x = -6 and y = 0 for number nine.

$6x+3y=24\\2x+3y=-12$

Change the signs of the second equation becuase 3y and 3y are both positive. We need one of them to be negative.

$6x+3y=24\\-2x-3y=12$

Add them.

$4x = 36$

$x=9$

Now we have to figure out y.

$2(9)+3y=-12$

$18+3y=-12$

$3y=-30$

$y=-10$

x=-9 and y=-10 is your answer to number ten.

$10x+5y=25\\-7x-3y=-18$

$30x+15y=75\\-35x-15y=-90$

$-5x=-15$

$x=3$

$-7(3)-3y=-18$

$-21-3y=-18$

$-3y=3$

$y=-1$

x=3 and y=-1 is the answer to number eleven. I hope this helps! Let me know if I got anything wrong.

4 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%284v%5E%7B-3%7D%20%29%5E3%2F3v%5E%7B-8%7D" id="TexFormula1" title="(4v^{-3} )^3/3v^{-8}" alt=

Svet_ta [14]

Answer:

$=\frac{64}{3v}$

Step-by-step explanation:

One is given the following equation:

$\frac{(4v^-^3)^3}{3v^-^8}$

Simplify the numerator, remember to raise every number inside the parenthesis to the exponent outside of the parenthesis. Bear in mind, an exponent raised to another exponent is equal to the exponent times the exponent it is raised to. Then simplify by multiplying the number by itself the number of times that the exponent indicates.

$\frac{(4v^-^3)^3}{3v^-^8}$

$=\frac{4^3(v^-^3)^3}{3v^-^8}$

$=\frac{4^3v^-^9}{3v^-^8}$

$=\frac{64v^-^9}{3v^-^8}$

Bring the variable (v) in the denominator (value under the fraction bar) to the numerator (value ontop of the fraction bar) by multiplying its exponent by (-1). This can be done simply because all operations in this equation are multiplication or division, remember, an exponent is another form of multiplication.

$=\frac{64v^-^9}{3v^-^8}$

$=\frac{(64v^-^9)(v^(^-^1^)^(^-^8^))}{3}$

Simplify, remember, multiplying two numbers with the same base that have an exponent is the same as adding the two exponents,

$=\frac{(64v^-^9)(v^(^-^1^)^(^-^8^))}{3}$

$=\frac{(64v^-^9)(v^8)}{3}$

$=\frac{64v^-^9^+^8)}{3}$

$=\frac{64v^-^1}{3}$

Now bring the variable to the denominator so that there are no negative exponents. Use a similar technique that was used to bring variables with exponents to the numerator.

$=\frac{64v^-^1}{3}$

$=\frac{64}{3(v^(^-^1^)^(^-^1^))}$

$=\frac{64}{3v^1}$

$=\frac{64}{3v}$

5 0

3 years ago

Convert 6 1/4 lb to ounces.

poizon [28]

Answer:

B 100 ounces

Step-by-step explanation:

There's 16 ounces in a pound. So multiply 6.25 by 16 to get 100.

7 0

2 years ago

If <img src="https://tex.z-dn.net/?f=%5Cint%5Climits%5E6_1" id="TexFormula1" title="\int\limits^6_1" alt="\int\limits^6_1" align

navik [9.2K]

Answer:

Step-by-step explanation:

[1 , 6] = [1 , 3] + [3 , 6]

[6 , 3] = 10

[3 , 6] = -10

22 = [1 , 3] + (-10)

[1 , 3] = 22 + 10 = 32

7 0

3 years ago