Answer:
Option 1.
The solution set is: {n|n is a real number, n≥3}
Step-by-step explanation:
1. You must read carefully the information given in the problem: "One less than twice a number" indicates that you must write a number 
multiplied by 2 and subtract 1 from this term, as following:
2. "is not less than five" indicates that the result must be equal or greater than 5. Then, you obtain the following expression:
3. Now, you can solve for . Then, you obtain:
4. Then, the solution set is: {n|n is a real number, n≥3}.
5. The correct plot on the number line must show a circle on 3 (You must fill in the circle if the sign is 
or
) with a line from that circle to the right.
5. Therefore, the answer is the first option.
The probability that a plant in the experiment receives visible or ultraviolet light is 7/10.
<u>Step-by-step explanation</u>:
The total number of plants in the experiment = 30 plants
Plants that receive visible light alone = 12 plants
Plants that receive ultraviolet light alone = 15 plants
Plants that receive both visible and ultraviolet light = 6 plants
<u>step 1</u> :
<em>Probability = No. of required events / Total number</em>
<u>step 2</u> :
P(visible) = 12 / 30
P(ultraviolet) = 15 / 30
P(both) = 6 / 30
<u>step 3</u> :
P(visible or ultraviolet) = P(visible) + P(ultraviolet) - P(both)
= 12/30 + 15/30 - 6/30
= 21/30
P(visible or ultraviolet) = 7/10
Answer:
Step-by-step explanation:
<u>Given</u>
<u>Simplify</u>
Compare left and right sides and
<u>Find b:</u>
- <u />
b = 15 ⇒ b = 15*3/5 = 9
<u>Find c:</u>
- 1 + c = 7 ⇒ c = 7 - 1 = 6
<u>Find a:</u>
- a + 2 = 10 ⇒ a = 10 - 2 = 8
<u>Find d:</u>
<u>Solution is:</u>
Answer:
she ate 4 slices
Step-by-step explanation:
