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3 years ago

OMG PLLS HELP!!! EXRA POINTS AND BRAINLEIST!Also don't comment if you don't know or you claim you'll 'send me the link!!!

Mathematics

1 answer:

Irina-Kira [14]3 years ago

3 0

Answer:

Step-by-step explanation:

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How many pounds of almonds worth 20 cents a pound must be mixed with 40 pounds of peanuts worth 40 cents a pound to get a mixtur

Mrrafil [7]

To solve the problem we must establish two equations.
let x be the mass of the 20 cents almonds
y be the mass of the 36 cents mixture
first equation is:

x + 40 = y

the second equation is:
0.2x + 40(0.4) = 0.36y

solving the equations simultaneously
x = 10 lb of the 20 cents almonds is needed to mix

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4 years ago

Find the perimeter of the rectangle in yards

LiRa [457]

Answer:

i would help but there is no equation so i cant find the answer

Step-by-step explanation:

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3 years ago

Read 2 more answers

How many gallons of 30% alcohol solution and how many of 60% alcohol solution must be mixed to produce 18 gallons of 50% solutio

allochka39001 [22]

Answer:

x = 6 gallons (of 30% alcohol)

y = 12 gallons (of 60% alcohol)

Step-by-step explanation:

Let

x = liters of 30% alcohol

y = liters of 60% alcohol

There are two unknowns, we need two equations

x + y = 18. (1)

0.30x + 0.60y = 0.50(x+y) (2)

From (1)

x + y = 18

y = 18-x

Substitute the value of y into (2) and solve for x:

0.30x + 0.60y = 0.50(x+y)

0.30x + 0.60(18-x) = 0.50(x+18-x)

0.30x + 10.8 - 0.60x = 0.50(18)

10.8 - 0.30x = 9

-0.30x = -1.8

Divide both sides by -0.30

x = 6 gallons (of 30% alcohol)

Substitute x=6 into (1) and solve for y:

x + y = 18

6 + y = 18

y = 12 gallons (of 60% alcohol)

5 0

3 years ago

Hi All,

tangare [24]

Answer:

a) modal number of teachers in a car is 3

b) median number of teachers in a car is 3

c) mean number of teachers in a car is 2.5

Step-by-step explanation:

modal number is 3 because that is the highest frequency of numbers of cars
median number is 3 because it is the middle number when you expand the frequency table.
mean number is 2.5 because that is the approximate average of all the numbers.

8 0

3 years ago

Shawn wanted to model the number 13,450 using 13,450 using base-ten blocks how many large cubes, flats, and longs does he need t

Alex17521 [72]

Answer:

See attached

Step-by-step explanation:

13450 = 13000 + 400 + 50

13*1000 = 13 large cubes
4*100 = 4 flats
5*10 = 5 longs

6 0

3 years ago