Answer:
N80
Step-by-step explanation:
One ruler is N60 and one pencil is N20.
I hope this helps you
y=6 x=24
y=7 x=?
?.6=7.24
?=7.24/6
?=7.4
?=28
It equals 72. If you have a problem like this again first start with the brackets, and the parentheses inside the brackets (if there is any). Then move onto the others outside the brackets like other parentheses (if there is any)
r = √(3V/πh)
multiply both sides by 3 to eliminate the fraction
πr²h = 3V ( divide both sides by πh )
r² = 3V/ πh ( take the square root of both sides )
r = √(3V/πh)
Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define</u>
<u />
<u />
<u />
<u>Step 2: Solve for </u><em><u>y</u></em>
- Cross-multiply:

- Multiply:

- Isolate <em>y</em>:

- Rewrite:

<u>Step 3: Check</u>
<em>Plug in y to verify it's a solution.</em>
- Substitute:

- Divide:

Here, we see that 3.125 does indeed equal 3.125. ∴ y = 1.44 is a solution of the equation.