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nalin [4]
3 years ago
14

There are 32 red or blue marbles in a bag. The number of red marbles is 4 more than 3 times the number of blue marbles. Write an

d solve a system of linear equations. How many red marbles are in the bag? How many blue marbles are in the bag?
Mathematics
1 answer:
eimsori [14]3 years ago
5 0

Answer:

# red marbles = 25

# blue marbles = 7

Step-by-step explanation:

r + b = 32

r = 4 + 3b

substitute '4 + 3b' for 'r' in the 1st equation

4 + 3b + b = 32

4 + 4b = 32

4b = 28

b = 7

red = 32 - 7

r = 25

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trapecia [35]
To solve this problem
Let X be pounds of rose petals needed.
ATQ
0.875 pounds of rose petals are in 1 bottle.
So, 0.875 / 1 = X / 86
( because we have to find how many petals {in pounds}are there  in 86 perfume bottles )
cross muliplying both side.
0.875 * 86 = X
75.25 = X
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8 0
3 years ago
Read 2 more answers
Listed below are the measured radiation emissions​ (in W/kg) corresponding to cell​ phones: A,​ B, C,​ D, E,​ F, G,​ H, I,​ J, a
Sophie [7]

Answer: a. Mean = 0.696364

b. Median = 0.64

c. Midrange = 0.895

d. There is no Mode

e. 2. The maximun data value is the most relevant statistic, because it is closest to the limit of 1.6W/kg and that cell should be avoided.

Step-by-step explanation:

a) Mean is an average number of the data set, calculated by the sum of all the value divided by the quantity of the set:

mean = \frac{0.75+0.22+1.23+0.64+0.54+0.24+0.81+1.57+0.29+1.02+0.35}{11}

mean = 0.696364

b) Median is the middle number in the list of numbers. In this case, since there are 11 elements in the set, the middle number is:

sorted numbers of the data set:

0.22 0.24 0.29 0.35 0.54 0.64 0.75 0.81 1.02 1.23 1.57

median = 0.64

c) Midrange is another type of average number. It is calculated as:

midrange = \frac{high+low}{2}

midrange = \frac{1.57+0.22}{2}

midrange = 0.895

d) Mode is the number that appears most often in the list of numbers. For this data set, each number appears only one time, so there is no mode.

Mode = 0

e) According to the question, cell phone radiation is dangerous when it is higher than 1.6W/kg. The cell phone with the maximum data value (1.57 W/kg) should be avoided, since it is too close to the limit described.

So, the measures of center are not the most important statistic to be observed but the maximum data value.

7 0
3 years ago
5/8 divided by 2<br><br> I need this fast!
Annette [7]

Answer:

1 1/4

Step-by-step explanation:

5/8 ÷ 2

Copy dot flip

5/8 * 2/1

Rewriting

5/1 * 2/8

5 * 1/4

5/4

1 1/4

6 0
2 years ago
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A triangle with equal sides and a square have the same perimeters. The length of a side of the triangle is 2x + 2. The length of
andreev551 [17]

Answer:

x=13

Step-by-step explanation:

3(2x+2)=4(x+8)\\6x+6=4x+32\\2x+6=32\\2x=26\\x=13

3 0
3 years ago
I really need help :)
iren2701 [21]

Answer:

Could anyone help me with this problem please?

What is one value that makes the fraction (x^2 + 11x +30)/(4x + 44x^2 + 120x) Undefined?

Need real help I'm so stressed out

Step-by-step explanation:

8 0
2 years ago
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