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ratelena [41]
3 years ago
13

You decided to give your friend marbles for his birthday. Since you know he like red marbles better than brown ones, the number

of red marbles in the bag is 4 fewer than 5 times the number of brown marbles. The bag contains 74 marbles. Which system of equations can be used to determine r, the number of red marbles and b, the number of brown marbles?
r + 5b = 4 r + b = 74
r + 5b = 74 r - b = 4
4 - 5b = r 5b + r = 74
5b - 4 = r r + b = 74
Mathematics
1 answer:
zloy xaker [14]3 years ago
5 0
3rd option is the correct answer.
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Can someone please tell me how to solve this?: -27 , exponent 2/3<br><br><br><br> -27^2/3
Vlada [557]
So this is asking the cube root of -27 then squared.
Cube root of -27=-3
And -3^2=9

So I believe your answer is 9
4 0
3 years ago
The diameters of ball bearings are distributed normally. The mean diameter is 87 millimeters and the standard deviation is 6 mil
devlian [24]

Answer:

69.14% probability that the diameter of a selected bearing is greater than 84 millimeters

Step-by-step explanation:

According to the Question,

Given That, The diameters of ball bearings are distributed normally. The mean diameter is 87 millimeters and the standard deviation is 6 millimeters. Find the probability that the diameter of a selected bearing is greater than 84 millimeters.

  • In a set with mean and standard deviation, the Z score of a measure X is given by Z = (X-μ)/σ

we have μ=87 , σ=6 & X=84

  • Find the probability that the diameter of a selected bearing is greater than 84 millimeters

This is 1 subtracted by the p-value of Z when X = 84.

So, Z = (84-87)/6

Z = -3/6

Z = -0.5 has a p-value of 0.30854.

⇒1 - 0.30854 = 0.69146

  • 0.69146 = 69.14% probability that the diameter of a selected bearing is greater than 84 millimeters.

Note- (The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X)

7 0
3 years ago
Solve for the variable m. m-n=5
dolphi86 [110]

if you wanna solve for m you have get m by him self.

m-n = 5

m-n+n = 5+n

m = 5+ n

there is your answer. hope it is heplful

6 0
3 years ago
City A is 10 miles from city B and 5 miles from city C. Cities A, B, and C form a right triangle at A. A road connects cities B
laila [671]

Answer:

11.18 miles

Step-by-step explanation:

The sides of a right triangle a, b, c are related by the equation

a^2 + b^2 = c^2

where c is the longest side of the triangle

Hence given that A connects B and C directly and forms a right angle at A

5^2 + 10^2 = c^2

Where c is the length of the road

25 + 100 = c^2

125 = c^2

c = 125^1/2

= 11.18 miles

3 0
2 years ago
Can someone please help me with this ?
natulia [17]
13. 1,6

18. -15,12

19. -7, 1/2
4 0
3 years ago
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