3 years ago

Lena has an envelope that is 3 inches tall. The envelope is 3 9/10 times as long as it is tall. How long is her envelope?

Mathematics

2 answers:

Kaylis [27]3 years ago

8 0

Answer:

11.7 Inches

Step-by-step explanation:

9/10 is 0.9, so 3+0.9= 3.9

3.9 x 3 is 11.7 inches, or you can round it to 12 inches or a foot.

disa [49]3 years ago

5 0

11.7 or if rounded up then 12 inches

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Solve the compound inequality 4x – 7 > 5 or 5x + 4 ≤ –6

bija089 [108]

Answer:

inequality form: x $\leq$ -2 or x > 3

interval notation form: (-∞,-2] ∪ (3,∞)

Step-by-step explanation:

I attached a picture that shows all the work. You begin by isolating then solving for x on both sides. Then form a solution using the information found out about x. For example, you can combine the found inequalities for x to solve that x must be GREATER than 3 while being LESS than -2. Using that you can form an line and make a line. Remember, when writing in interval notation form you always begin from the left to the right (in reference) to the number line.