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Taya2010 [7]
3 years ago
10

Two brothers are saving money to buy tickets to a concert their combined savings is 55. one brother has 15 more than the other.

how much has each saved
Mathematics
1 answer:
ser-zykov [4K]3 years ago
3 0
Let the amount saved by the brother that has less savings be x, then the savings of the other brother is x + 15.

Since their total savings is 55, then
x + x + 15 = 55
2x + 15 = 55
2x = 55 - 15 = 40
x = 40 / 2 = 20

Therefore, one person saved 20 and the other saved 20 + 15 = 35.
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Need help with this,30 points, please help very soon, thanks
Makovka662 [10]

The speed of the airplane is 360 km/h while the speed of the wind is 40 km/h.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

Let a represent the speed of the airplane and b represent the speed of the wind, hence:

(a + b)6 = 2400  

a + b = 400     (1)

Also:

(a - b)7.5 = 2400

a - b = 320   (2)

From eqn 1 and 2:

a = 360 km/h, b = 40 km/h

The speed of the airplane is 360 km/h while the speed of the wind is 40 km/h.

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8 0
1 year ago
(CO 3) On average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 6.1 inches. Find the probabi
ololo11 [35]

Answer:

C. Probability is 0.90, which is inconsistent with the Empirical Rule.

Step-by-step explanation:

We have been given that on average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 6.1 inches.

First of all, we will find z-score corresponding to 87.5 and 107.5 respectively as:

z=\frac{x-\mu}{\sigma}

z=\frac{87.5-97.5}{6.1}

z=\frac{-10}{6.1}

z=-1.6393

z\approx-1.64

z=\frac{x-\mu}{\sigma}

z=\frac{107.5-97.5}{6.1}

z=\frac{10}{6.1}

z=1.6393

z\approx 1.64

Now, we need to find the probability P(-1.64.

Using property P(a, we will get:

P(-1.64

From normal distribution table, we will get:

P(-1.64

P(-1.64

P(-1.64

Since the probability is 0.90, which is inconsistent with the Empirical Rule, therefore, option C is the correct choice.

6 0
3 years ago
Two resorts advertise an average temperature of 75°F during the peak season. A travel agent researches the daily high temperatur
tester [92]

ans C. the average temperature at the two resorts is about the same, but the range of temperature is different

4 0
3 years ago
Read 2 more answers
Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function.
finlep [7]

Answer:

zero ang sagot :)

Step-by-step explanation:

(0×6)×(3.15-8)×(9-5)

0(3.15-8)×(9-5)

=0

4 0
3 years ago
What fraction is equivalent to 30/360?
Firdavs [7]

Answer:

1/12

Step-by-step explanation:

Given that

30/360 to lowest fraction equivalent

Now, we can write 30 as 3×10

Also, we can write 360 as 36×10

Then, we have

(3×10)/(36×10)

Then, 10 cancel 10, we are left with

3/36

Also we can write 36 as 12×3

Then, we have

3/(12×3)

Also, 3 cancel 3, we are left with

1/12

Then the lowest fraction is 1 / 12

1/12

4 0
2 years ago
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