Fifty students were eating lunch in the school cafeteria. The ratio of boys to girls was 25:25. Mrs. White asked Kym to explain what that ratio meant. Kym said it meant that 25% of the students in the cafeteria were boys. Explain why Kym is incorrect.

Answer:

She rode [tex]1\frac{1}{2}[/tex] miles from her friends house to school.

Step-by-step explanation:

Geneva rode her bike a total =  [tex]2\frac{1}{2}[/tex] miles

She rode from her house to the park = [tex]\frac{4}{5}[/tex] miles

She rode from the park to her friend's house = [tex]\frac{1}{5}[/tex] miles

total distance from her house to her friend's house = [tex]\frac{4}{5}+\frac{1}{5}[/tex] = 1 mile

Finally she rode the rest of the way to her school.

distance between her friend's house to school = [tex]2\frac{1}{2}-1[/tex] = [tex]\frac{3}{2}[/tex] miles

[tex]1\frac{1}{2}[/tex] miles she rode from her friends house to school

The time required for the principal amount to double is 13 years 10 months and 10 days approx.

Compound interest simply refers to the fact that an investment, loan, or bank account's interest accrues exponentially over time as opposed to linearly over time. The term "compound" is crucial here.

CI Formula. C.I. = Principal (1 + Rate)^time − Principal.

Given, A sum of $5000 is invested at an interest rate of 5% per year.

hence, principle = 5000

Amount = 10000

rate = 5%

let's assume the time is x

Let's solve for time

A(t)= 10000 = 5000* e⁵ˣ/¹⁰⁰

2 = (e)^x/20

taking logs on both sides

ln 2 = x / 20

x = 20 ln2

time required = 20 ln2 = 20 * 0.69 = 13.86

Therefore, To make the amount double at the interest rate of 5% we need time approx 13 years 10 months, and 10 days.

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divide 9 by 1200

9 / 1200 = 0.0075 = 0.75%

An isotherm on a geographic map is a type of equal temperature at a given date or time. And if we talk about thermodynamics, it is a curve on a Pressure – Volume diagram at a constant temperature.

Basing from the graph, we can actually see that the interval is:

10 Fahrenheit degrees

(3^8 *2^-5 *9^0)^-2 *  (2^-2/3^3)^4 * 3^28 =

(6561 * 0.03125 * 1)^-2 * (0.25/27)^4 * 2.287679245x10^13 =

0.0000237881 * 0.00000000073503 * 2.287679245x10^13 =

0.40000008, round to 0.4

The sum of all 3-digit whole numbers that are divisible by 13 is [tex]\( \boxed{37674} \)[/tex].

To find the sum of all 3-digit whole numbers that are divisible by 13, we can use the arithmetic series formula.

1. Identify the first and last 3-digit numbers divisible by 13:

  - The smallest 3-digit number divisible by 13 is 104 (since [tex]\( 13 \times 8 = 104 \)[/tex]).

  - The largest 3-digit number divisible by 13 is 988 (since [tex]\( 13 \times 76 = 988 \)[/tex]).

2. Calculate the number of terms in the series:

  - Use the formula for the number of terms n in an arithmetic sequence:

[tex]\[ n = \frac{\text{last term} - \text{first term}}{\text{common difference}} + 1 \][/tex]

  Here, the common difference d = 13:

[tex]\[ n = \frac{988 - 104}{13} + 1 = \frac{884}{13} + 1 = 68 + 1 = 69 \][/tex]

3. Find the sum of the arithmetic series:

  - The sum [tex]\( S_n \)[/tex] of the first n terms of an arithmetic series is given by:

[tex]\[ S_n = \frac{n}{2} \times (\text{first term} + \text{last term}) \][/tex]

  Substitute the values:

[tex]\[ S_{69} = \frac{69}{2} \times (104 + 988) \][/tex]

  Simplify the calculation:

[tex]\[ S_{69} = \frac{69}{2} \times 1092 = 34.5 \times 1092 = 37674 \][/tex]

Thus, the sum of all 3-digit whole numbers that are divisible by 13 is [tex]\( \boxed{37674} \)[/tex].

The domain of the function y = ln (-x + 3/2) is all real numbers less than 3/2, represented in interval notation as (-∞, 3/2). This is because the argument of the logarithm must be positive, leading to an inequality that restricts x to be less than 3/2.

The domain of a function refers to the complete set of possible values of the independent variable. For the function y = ln (-x + 3/2), we must consider where the argument of the natural logarithm, -x + 3/2, is greater than zero. This is because the natural logarithm function is defined only for positive arguments.

To find the domain, set the argument of the logarithm function greater than zero: -x + 3/2 > 0. Solving this inequality, we find -x > -3/2, hence x < 3/2. This means that the domain of the function is all real numbers less than 3/2, which can be written in interval notation as (-∞, 3/2).

The domain of a function is the set of all possible input values. In the function y = ln(-x + 3/2), the natural logarithm function is defined only for positive numbers, so to find the domain, we need to identify the values of x that make the argument of the logarithm greater than zero.

Solve for the argument inside the logarithm to be greater than zero: -x + 3/2 > 0

Simplify the inequality to find the valid domain: x < 3/2

Therefore, the domain of the function y = ln(-x + 3/2) is x < 3/2.

0.5x-9 = 4x+5

add 9 to both sides

0.5x = 4x+14

subtract 4x from each side

-3.5x =14

x = 14/*3.5

x = -4

Answer:

Area of the triangle will be 162.3 cm²

Step-by-step explanation:

From the figure attached,

In the triangle ABC angle ACB = 23°, side BC = 27.6 cm and hypotenuse AC = 30 cm

Now we have to calculate the area of the given right angle triangle.

Since area of a right angle triangle is represented by

Area = [tex]\frac{1}{2}\times b\times h[/tex]

Where b = adjacent side

h = opposite side

To calculate the opposite side of the triangle we will apply Pythagoras theorem in the ΔABC.

AC² = AB² + BC²

AB² = AC² - BC²

AB² = (30)² - (27.6)²

      = 900 - 761.76

      = 138.24

AB = √138.24

     = 11.76

Area of the triangle = [tex]\frac{1}{2}(AB)(BC)[/tex]

                                 =  [tex]\frac{1}{2}(11.76)(27.6)[/tex]

                                 = 162.28 cm² ≈ 162.3 cm²

Ina case whereby Andrew believes that the probability that he will win the tennis match is 2/9.the probability that he will lose the tennis match is [tex]\frac{7}{9}[/tex]

Probability is the likelihood that something will occur. When we're not sure how something will turn out, we can discuss the likelihood of different outcomes, or their probabilities. Statistics is the study of events that follow a probability distribution.

p(he will win the tennis match )= 2/9.

P(he will lose the tennis match) =1 - 2/9

[tex]\frac{9}{9} -\frac{2}{9}[/tex]

=[tex]\frac{7}{9}[/tex]

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The coefficient of the squared term in the parabola's equation, with a vertex at (3,5) and passing through the point (-1,6), is 1/16.

The student is asking about the coefficient of the squared term in the parabola's equation given that the vertex is at (3,5) and another point on the parabola is (-1,6). Since we know the vertex, we can write the vertex form of a parabolic equation as:

y = a(x - h)
^2 + k

Plugging the vertex into the equation, we get:

5 = a(3 - 3)
^2 + 5

This simplifies down to:

5 = a(0) + 5

So, we cannot determine 'a' from the vertex alone. However, we can use the other point to find 'a'. Plugging the coordinates (-1,6) into the vertex form, we get:

6 = a(-1 - 3)^2 + 5

6 = a(-4)^2 + 5

6 = 16a + 5

1 = 16a

a = 1/16

Therefore, the coefficient 'a' is 1/16.

Answer:

2.1 +2x=7.5

Step-by-step explanation:

3 girls to 5 boys

3+5 =8

120/8 = 15

3 *15 = 45 girls