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Serga [27]
3 years ago
5

The store has sold 90 notebooks which is 20% of all the notebooks they had how many notebooks did the store have at first

Mathematics
1 answer:
kirill115 [55]3 years ago
4 0
90 is 20% so

90 x 5 = 450 note books
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A beverage producer makes two products, Pi Cola, containing 10% cola, and Pi Up, containing 50% cola. How many gallons of Pi Up
max2010maxim [7]

Answer:

The number of gallons of Pi Up required is 900 gallons.

Step-by-step explanation:

Two different drinks that are produced by the beverage producer are Pi Cola which contains 10% Cola and Pi Up which contains 50% cola.

A solution is to be created using Pi Cola and Pi Up to create a new product containing 40% cola.

It has been mentioned that the number of gallons of Pi Up to be used is 300 gallons.

We can write that the number of gallons of Pi Up that must be mixed with 300 gallons of Pi Cola be x gallons.

So we write the first equation and we can say that the total number of gallons of the solution is x + 300.

Equating the percentage of cola from each beverage to get the required 40% cola we can write

  (0.1 × 300) + (0.5 × x)  = 0.4 × ( x + 300)

If we solve for x from the above equation we get

  (0.5 x + 30)  = (0.4 x + 120)

⇒ 0.1 x  = (120 - 30)  = 90

⇒ x  = 900 gallons

Therefore the number of gallons of Pi Up required is 900.

5 0
3 years ago
will givebrainlyest and 46 points need asap right tringle the base of the trinagle has a base of ten and the angle on the right
Elenna [48]
<h2>Answer: </h2>

<u>In a right triangle, Relation of base and hypotenuse is cosine</u>.

cos40° = 10/h

0.76604 = 10 × h

0.76604h = 10

h = 10/0.76604 = 13.05units.

7 0
2 years ago
The sum of two numbers is 49 and the difference between these two numbers is 9. What are these two numbers?​Shown working out pl
8_murik_8 [283]

Let numbers be x and y

ATQ

  • x+y=49---(1)

  • x-y=9---(2)

Adding both

\\ \sf\longmapsto 2x=58

\\ \sf\longmapsto x=\dfrac{58}{2}

\\ \sf\longmapsto x=29

Now putting value in eq(2)

\\ \sf\longmapsto x-y=9

\\ \sf\longmapsto 29-9=y

\\ \sf\longmapsto y=20

7 0
3 years ago
2 + 4 * 0 =? ?????&gt; ? ???
ozzi

2

Step-by-step explanation:

first you multiply 4x0

then you add 2

order of operations

8 0
2 years ago
MEDAL!!!!! Which of the following correctly identifies the set of outputs?
kramer
I think its a. but i could be wrong
5 0
3 years ago
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