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Trava [24]
3 years ago
9

May someone help me out with this please please

Mathematics
1 answer:
NISA [10]3 years ago
8 0
The answer is to this problem is C
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How many grams of a 15 percent alcohol solution should be mixed with 40 grams of a 30 percent solution to obtain a
Akimi4 [234]

The number of  grams is 20 grams

Let x represent how  many grams of a 15 percent alcohol solution

15%x+30%.40/x+40

=25%

0.15x+0.4.30=0.25 (x+40)

0.15x+12=0.25x+10

0.15x-0.25x=10+12

-0.1x=-2

x=-2/-0.1

x=20

Inconclusion The number of  grams is  20 grams

Learn more here:

brainly.com/question/24750329

4 0
2 years ago
A large statue is in the shape of a square pyramid. Each side of the base of the square pyramid is 723 feet long and the height
user100 [1]
Check the picture below.

3 0
3 years ago
In order to play in chess tournaments at the Marshall Club, Malik pays a fee to become a member. In addition, he pays a set rate
Keith_Richards [23]

Answer:

p = 22.50 + 15t

Step-by-step explanation:

For Malik :

Membership fee = m

Rate per tournament = t

After 4 tournaments :

m + 4t = 85 - - - (1)

After 7 tournaments :

m + 7t = 130 - - - (2)

Subtract 2 from 1

4t - 7t = 85 - 130

-3t = - 45

t = 45 / 3

t = 15

Put, t = 15 in (1)

m + 4(15) = 85

m + 60 = 85

m = 85 - 60

m = 25

Massai pays 10% less membership fee than Malik

Hence, Massai's membership fee:

(100 - 10)% * 25

0.9 * 25 = $22.50

Total price, p, Massai will pay to compete in t tournaments ;

Total price = membership fee + (rate per tournament * number of tournaments)

p = 22.50 + 15t

3 0
2 years ago
Creat a table of values for the equation y=-x-3
nadya68 [22]

Answer:

x /\ y

1  /\ -4

2 /\ -5

3 /\ -6

4 /\ -7

... /\ ...

Step-by-step explanation:

4 0
3 years ago
3. Marissa collected 8 seashells. Her sister Emily
eimsori [14]

Answer:

3

Step-by-step explanation:

There are 15 shells all together

there is 5 friends

15 divided by 5 is 3

Therefore  the answer is three

8 0
3 years ago
Read 2 more answers
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