4 years ago

Help please!

1 answer:

5 0

2x-3y=6
-3y=2x+6
y=-2/3x-2
So, the slope is -2/3
y=-2/3x+b
-3=-2/3(9)+b
-3=-6+b
-3/(-6)=b
1/2=b
So, the equation is y=-2/3x+1/2

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Elaine wants to buy a couch for $899.99 if she pays $69.75 in sales tax what is the sales tax percent explain steps

tigry1 [53]

Answer:

the sales tax percent is therefore: 7.75%

Step-by-step explanation:

The sales tax she paid is $69.75, for a sofa whose sale price is $899.99.

Since $69.75 is the unknown (x) percent of $899.99, then we write this statement in math terms as:

69.75 = x * 899.99

solving for x we get:

x = 69.75 / 899.99

x = 0.0775

this is the decimal form of the percent, and in order to write it as percent, we multiply it by 100:

the sales tax percent is therefore: 7.75%

6 0

4 years ago

Preform the indicated multiplication below. reduce the terms and simplify (2+i)(3-i)(1+2i)(1-i)(3+i)

lbvjy [14]

Answer:

Hey there!

Expand (2+i)(3-i). You should get 7+i

Expand (7+i)(1+2i). You should get 5+15i

Expand (5+15i)(1-i). You should get 20+10i

Expand (20+10i)(3+i). You should get 50+50i as your final answer.

Let me know if this helps :)

5 0

4 years ago

Х<br> 23.4 x 13.9<br> 0.18<br> pls help

Aliun [14]

Answer: 1610

Step-by-Step Explanation:

Lets round off each number,
=> 23.4 to 23
=> 13.9 to 14
=> 0.18 to 0.2

Therefore,
= 23 * 14 / 0.2
= 322 / 0.2
= 1610

7 0

3 years ago

Please help me i can’t get this one right. someone help me please if you know how to do this.

Sati [7]

Answer:

it’s going up by 3 boys per girl!

Step-by-step explanation:

Correct me if I’m wrong by commenting down below.

4 0

3 years ago

javier has 3 math books that are the same size. he makes a stack by placing the books on top of each other. The total stack is 1

Alexeev081 [22]

Answer:
The height of one book is $\frac{10}{3}$ in

Explanation:
We know that the 3 books are of the same size. This means that the 3 books have the same height.
Assume that each book has a height x in

Now, we know that the total height is 10 in.
Therefore:
x + x + x = 10
3x = 10
x = 10/3 in

Based on the above, the height of one book is 10/3 in

Hope this helps :)

4 0

3 years ago