Answer: 3x - 9
Step-by-step explanation: "9 less than three times a number" does not mean 9 minus three times a number, less than actually switches the order around so that 9 less than three times a number actually means three times a number minus 1 which can be read as 3x - 9.
Answer:
378 minutes.. 60 minutes x6 plus 3/10 of 1 hour Which is 18 minutes because 1/10 of 1 hour is 6 minutes x 3. Add them together
Step-by-step explanation:
Answer:
x > -4
Step-by-step explanation:
<u>Step 1: To combine like terms means to add the same variable numbers together.</u>
-6x + 5 - 4x < 45
<em>-10x + 5 < 45</em>
<u>Step 2: Subtract 5 from both sides</u>
-10x + 5 - 5 < 45 - 5
<em>-10x < 40</em>
<u>Step 3: Divide both sides by -10</u>
-10x / -10 < 40 / -10
Since you divided by a negative, you need to reverse/flip the sign.
<em>x > -4</em>
Answer: x > -4
Answer:
4/3 or 1.34
Step-by-step explanation:
2/3 ÷ 6/12
= 2/3 × 12/6
= 4/3 or 1.34
Answer:
She used 5.775 pints of white paint to paint her bedroom walls.
Step-by-step explanation:
This question can be solved using a system of equations.
I am going to say that:
x is the amount of white paint used.
y is the amount of blue paint used.
7.7 pints of blue paint and white paint to paint her bedroom walls.
This means that
1/4 of this amount is blue paint, and the rest is white paint.
The rest is 1-(1/4) = 3/4. That is, the amount of white paint is the triple of the amount of blue paint. That is, , or
Replacing in the first equation:
She used 5.775 pints of white paint to paint her bedroom walls.