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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?

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!

$\textit{\textbf{Spymore}}$

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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