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Blababa [14]
3 years ago
15

A box in a college bookstore contains books, and each book in the box is a history book, an English book or a science bok. If 1/

3 of these books are history books and 1/6 of these books are English books, what fraction of the books are science books?
Mathematics
1 answer:
Rufina [12.5K]3 years ago
7 0
1/2 are science because if you make 1/3, 2/6 + 1/6= 3/6. 3/6 = 1/2. 1/2 and 1/2 make a whole.
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A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the te
mash [69]
How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment?

1. Look at how 60% is closer to the solution of lower concentration (50%). You can deduce that you will be mixing a higher volume of the 50% solution.

2. All 4 answers add up to 105ml.

3. The intuitive answer is the first option:
70 ML of the 50% solution and 35 ML of the 80% solution

4. Let's check whether point 3 is true.
70ml/105ml X 0.5 + 35ml/105ml X 0.8 = (35 + 28)/105= 63/105= 60% / 105 ml = 105ml of 60% sugar solution
3 0
3 years ago
Please Please Please Please Help Please...
nekit [7.7K]

Answer: correct trigonometric ratios

SinB, tanA and cos A.

Step-by-step explanation:

The right triangle has two sides 5 and 12 , by Pythagoras it's hypotenuse is 13.

Tan B=5/12,

Sin A =12/13

5 0
3 years ago
During a promotion at Dale's Donuts, customers received
Snezhnost [94]

Answer:

divide 528 by 88 and you will get 6

therefore, each person will receive 6 donuts :)

Step-by-step explanation:

4 0
3 years ago
brian family drinks a gallon of milk in three days how much gallons of milk will brian family drink in five days
Otrada [13]

To calculate this, we have to establish a proportion :

If 1 gallon of milk is drunk in 3 days,​

X gallons will be drunk in 5 days​

X gallons = 1 gallon*5days/3days = 1.66 gallons will drink in 5 days.​

​We can round to the first decimal place 1.66 ≈ 1.7 gallons approximately.

Answer : 1.7 gallons will Brian family drink in five days, approximately.​

​Hope this helps!​​​​

\textit{\textbf{Spymore}}​​​​​​ ​

6 0
3 years ago
Y=2x y=7x + 15 substitution
sergejj [24]

y = 2x \\ y = 7x + 15

Substitute the given value of y into the equation y=7x+15

2x = 7x + 15

Move the variable to the left-hand side and change its sign

2x - 7x = 15

Collect like terms

- 5x = 15

Divide both sides of the equation by -5

x =  - 3

Substitute the given value of x into the equation y=2x

y = 2 \times ( - 3)

Solve the equation for y

y =  - 6

The possible solution of the system is the ordered pair (x,y)

(x,y) = ( - 3, - 6)

7 0
2 years ago
Read 2 more answers
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