Answer:
A,C,D
Step-by-step explanation:
The only one you might use it the triangle
Answer:
The difference of the two means is not significant, so the null hypothesis must be rejected.
Answer:
See explanation
Step-by-step explanation:
<u>Step 1.</u> Substitute for d to solve for n:
From the first equation:

Then substitute it into the second equation:

<u>Step 2:</u> Substitute for n to solve for d:

There are 40 dimes and 30 nikels in the piggy bank
First isolate
by subtracting 1 from both sides of the equation.
That gives you
.
From here, since x is being divided by 2, multiply both sides of the equation by 2.
So <em>x = 10</em>.
Work is attached in the image below.
You can use proportions in all of these as I explained in another one of your questions. I'll post the answers if you still want them.