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strojnjashka [21]
3 years ago
8

Every 2 days a scientist spends 12.5 hours observing dolphins and 3.5 hours observing sea lions. At this rate, how many total ho

urs will the scientist spend observing dolphins and sea lions in 6 days?
Mathematics
1 answer:
Mashutka [201]3 years ago
4 0
14.25 hours <--------
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Write the equation of a line that goes through the points (-7,9) and (-4,3).
solong [7]

Answer:

y= -2x - 5

Step-by-step explanation:

You have use to slope intercept and formula to get the answer.

3 0
3 years ago
A group of 120 people touring Europe includes 45 people who speak French, 42 who speak Spanish, and 50 who speak neither languag
lianna [129]

Answer : P(\text{this group will speak both French and Spanish})=0.141666666

Explanation:

Since we have given that

n(U) = 120, where U denotes universal set ,

n(F) = 45, where F denotes who speak French,

n(S) = 42 , where S denotes who speak Spanish,

n(F∪S)' = 50

n(F∪S) = n(U)-n(F∪S) = 120-50 = 70

Now, we know the formula, i.e.

n(F∪s) = n(F)+n(S)-n(F∩S)

⇒  70    = 45+42-n(F∩S)

⇒ 70  =  87- n(F∩S)

⇒ 70-87 = -n(F∩S)

⇒ -17 = -n( F∩S)

⇒  17 = n(F∩S)

P(\text{this group will speak both French and Spanish})= \frac{17}{120}\\P(\text{this group will speak both French and Spanish})=0.141666666

3 0
3 years ago
What is 2 3/5 multiplied by 2 as a mixed number or fraction
Bond [772]

Answer:

5 1/5

Step-by-step explanation:

2 3/5 * 2= 5 1/5


mark brainliest  :)

7 0
4 years ago
2 Points
Mashcka [7]

Answer:

C

Step-by-step explanation:

Factor: -7x^2 -5x+18

Factor -1 out of 7x^2 -5x +18:

−(7x^2+5x−18)

Factor.

1. 18 is negative, so a negative number multiplied by a postive number.

2. You can't factor 7, so 7x times x.

(7x−9)(x+2)

4 0
4 years ago
Each set of (x, y) values represent a set of equivalent ratios. Find the ratio of x to y for each set to determine which set des
Assoli18 [71]
Answer: The correct set is choice D.

We are looking for the same ratio with the given set of measurements. So lets start by determine the ratio of nuts to raisins. It is 40.5 to 48.6 or reduced it is 5 to 6. If you divide the fraction, you get the decimal 0.83333.

Only one of the relationships given has the same ratio. It is choice D.  11 to 13.32 can be divided to get 0.83333.
5 0
3 years ago
Read 2 more answers
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