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katrin2010 [14]
3 years ago
10

Write an algebraic expression for 15 decreased by twice a number

Mathematics
2 answers:
horsena [70]3 years ago
6 0
15- (y2) should get you the answer... Hopefully.<span />
Daniel [21]3 years ago
5 0
The expression would be:
15-2x

Hope this helps!
-Benjamin
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Beth gets a sum of 5 when she rolls two fair number cubes. What is the probability that one of the fair number cubes is a 1?
ira [324]

Using it's concept, it is found that there is a 0.5 = 50% probability that one of the fair number cubes is a 1.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

The outcomes of the pair of cubes that result in a sum of 5 are as follows:

(1,4), (2,3), (3,2), (4,1).

Of those 4 outcomes, 2 involve a number 1, hence the probability is given by:

p = 2/4 = 0.5.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

6 0
2 years ago
During a scuba dive, Lainey descended to a point 19 feet below the ocean surface. She continued her descent at a rate of 25 feet
Leno4ka [110]

Answer:

25t+19\leq 144

t\leq5

The number of minutes she can continue to descend if she does not want to reach a point more than 144 feet below the ocean surface is <u>at most 5 minutes.</u>

Step-by-step explanation:

Given:

Initial depth of the scuba dive = 19 ft

Rate of descent = 25 ft/min

Maximum depth to be reached = 144 ft

Now, after 't' minutes, the depth reached by the scuba dive is equal to the sum of the initial depth and the depth covered in 't' minutes moving at the given rate.

Framing in equation form, we get:

Total depth = Initial Depth + Rate of descent × Time

Total depth = 19+25t

Now, as per question, the total depth should not be more than 144 feet. So,

\textrm{Total depth}\leq 144\ ft\\\\19+25t\leq 144\\\\or\ 25t+19\leq 144

Solving the above inequality for time 't', we get:

25t+19\leq 144\\\\25t\leq 144-19\\\\25t\leq 125\\\\t\leq \frac{125}{25}\\\\t\leq 5\ min

Therefore, the number of minutes she can continue to descend if she does not want to reach a point more than 144 feet below the ocean surface is at most 5 minutes.

7 0
3 years ago
If there are 36 boys and 54 girls in a room, fill out all of the possible ratios of boys to girls that could be made.
aleksandr82 [10.1K]

Answer:

2:3

Step-by-step explanation:

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3 years ago
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Find the exact value of cos(-pi/12)
dezoksy [38]

Answer:

0.96592 or 0.97

Step-by-step explanation:

5 0
3 years ago
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There are 32 students in Joe's class. Of the 32 students, 8 students ride their bikes to school, 5 walk to school, 4 ride to sch
vampirchik [111]

Answer:

5/32 (aka option A) should be the correct answer!

Step-by-step explanation:

ok so... its 5/32 who walks to school!

since there are 5 students who walked to school, and 32 students are in the class, 5/32 should be the correct answer!

3 0
2 years ago
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