MATHEMATICS HIGH SCHOOL

What is y=3x+6 y=4x i need some help on it

Answers

Answer 1

Answer:

Answer:

I don't fully understand, but if it is a true or false question it is false

Step-by-step explanation:

If y=4x 3x+6=9

4<9

So, in all it would be false.

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After 25% of a bill is paid $80 still remains to be paid. how much was the bill?

Answers

the original bill was valued at 106.67 $

if 25% was paid, and 80 dollars are left, this means that 80 dollars is 75% of the bill. 25% is a quater, and 75% is three quarters.

here, we can divide 80 into three parts ->

80 ÷ 3 ≈ 26.67
that means a quater of the bill is 26.67 $

if 80$ were left to be paid, just add the 26.67$ from the first quater ->

80 + 26.67 = 106.67 $

I need to know the steps to do two step equations

Answers

$-20+20w=73\n20w=93\nw=(93)/(20)$

-20+20w=73

You need to get your variable by itself. Try to section your problem off if you need to. I always like to do my order of operations backwards. The inverse operation of -20 is adding 20 so to cancel that out you need to add 20 to each side. Now you are left with 20w=93.Now you need to get rid of the 20. The inverse of multiplying is dividing. So divide both sides by 20. You are left with 1w=4.65. Which is the same w=4.65 or you could say w=4 13/20. Hope this helps.

What is if g(x,y,z) = x + y and S is the first octant portion of the plane 2x + 3y + z = 6 ?

Answers

The question asks for the value of $I=\int\int_Sx+y\textrm{ }dS$ where $S=\{(x,y,z)\mid2x+3z+y=6,x\ge0,y\ge0,z\ge0\}$ .

First let's look at what that surface looks like.

Letting $y=z=0$ yields $x=3$
Letting $x=z=0$ yields $y=2$
Letting $x=y=0$ yields $z=6$

Therefore $S$ is the area of the triangle defined by the three points $(3,0,0),(0,2,0),(0,0,6)$ .

We can thus reformulate the integral as $I=\int_(z=0)^6\int_(x=0)^(6-z)x+ydxdz$ .

By definition on the plane $y=\frac{6-2x-z}3$ thus $I=\int_(z=0)^6\int_(x=0)^(6-z)x+\frac{6-2x-z}3dxdz=\int_(z=0)^6\int_(x=0)^(6-z)2+\frac x3-\frac z3 dxdz$

$I=\int_(z=0)^6\left[2x+\frac{x^2}6-\frac{zx}3\right]_(x=0)^(6-z)dz=\int_(z=0)^62(6-z)+\frac{(6-z)^2}6-\frac{z(6-z)}3\right]dz$

$I=\int_(z=0)^6\frac{z^2}2-6z+18=\left[\frac{z^ 3}6-3z^2+18z\right]_(z=0)^6=36-108+108$

Hence $\boxed{I=\int\int_Sx+y\textrm{ }dS=36}$

7 less than three fifths of b is a

Answers

Your equation would be ;
3/5b - 7 = a

it would be 3/5b-7=y?

Which ordered pair is a solution to the system of equations? Use any method to solve. 2x-y=5 3x+2y=4

Answers

Elimination

2 ( 2x -y=5) multiply = 4x -2y=10
3x +2y=4

* add the X's and the 10 and 4 7x=14 * divide by 7 giving you

x=2

*and then plug back in

3(2) +2y =4
6 + 2y = 4
2y= -2
y= -1

the order pair is ( 2 , -1)

2x-y=5

3x+2y=4

We need to solve 2x-y=5 for y

Now let's start by adding -2x to both sides

2x-y-2x=5-2x

-y=-2x+5

Divide both sides by -1 so we eliminate the negative sign

-y/-1=-2x+5/-1

y=2x-5

Now substitute 2x-5 for y in 3x+2y=4

3x+2y=4

3x+2(2x-5)=4

3x+4x-10=4

7x-10=4

Add 10 to both sides

7x-10+10=4+10

7x=14

Divide both sides by 7 so we can find the value for x

7x/7=14/7

x=2

Now substitute 2 for x in y=2x-5 so we can find the value for y

y=2x-5

y=(2)(2)-5

y=4-5

y=-1

Answer: (2,-1)

I hope that's help:0

Maria can type 25 words per minute while Amanda can type 30 words per minute. Maria was already typing for 12 minutes when Amanda started typing, how many minutes would it take for Maria and Amanda to type the same number of words?

Answers

The answer would be 10

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