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3 years ago

Hello I need help ......

Mathematics

2 answers:

Andreas93 [3]3 years ago

8 0

okay so for number 7 you count by 7s in the x column and in the y column you count by ones

Nostrana [21]3 years ago

3 0

Answer:

dang im a little late

Step-by-step explanation:

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How to solve a system of equations using elimination?

Nastasia [14]

If you have a problem like:
4x+2y=20
2x+2y=16
You would subtract
4x-2y=20
-2x+2y=16
You would get the new problum
2x=4
You now want to divide the 2 on both sides to solve for x
x=2

Now that you've solved for X you want to solve for y. So use substitution to solve for y. You would want to substatute the x for the 2 in either of the problums. I'll use the first one.
4(2)+2y=20

You first want to multiply te 4(2) you would get a new problum.
8+2y=20

Now you want to subtract the 8 on both sides.
2y=12

The last step to solve for y is to divide the 2 on both sides.
Y=6

So your answers would be
x=2
y=6

5 0

3 years ago

This map shows the location of mice in the maze.

Alekssandra [29.7K]

On point (5,1) Fam......................

3 0

3 years ago

Read 2 more answers

Find the area of a circle with radius equal to 6.<br><br> A =

anyanavicka [17]

Answer:

Step-by-step explanation:

hello :

A= πr² r = 6

so : A= 3.14(36) = 113.04

8 0

4 years ago

A person recently read that 84% of cat owners are women. How large a sample should the researcher take if she wishes to be 90% c

Lana71 [14]

Answer:

405

Step-by-step explanation:

To find sample size, use the following equation, where n = sample size, za/2 = the critical value, p = probability of success, q = probability of failure, and E = margin of error.

$n=\frac{(z_{\frac{\alpha }{2} })^{2} *p*q }{E^2}$

The values that are given are p = 0.84 and E = 0.03.

You can solve for the critical value which is equal to the z-score of (1 - confidence level)/2. Use the calculator function of invNorm to find the z-score. The value will given with a negative sign, but you can ignore that.

(1 - 0.9) = 0.1/2 = 0.05

invNorm(0.05, 0, 1) = 1.645

You can also solve for q which is 1 - p. For this problem q = 1 - 0.84 = 0.16

Plug the values into the equation and solve for n.

$n =\frac{(1.645)^2*0.84*0.16}{(0.03)^2}\\n= 404.0997333$

Round up to the next number, giving you 405.

6 0

3 years ago

Helphelphelphelphelp

harina [27]

Answer:

1.) Gallon

2.) Pound

3.) Foot

Step-by-step explanation:

Hope this helps :)

3 0

4 years ago