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horsena [70]
3 years ago
14

If there are 12 girls and 15 boys in a class, which ratios are true?

Mathematics
2 answers:
marishachu [46]3 years ago
7 0
The first three are true
N76 [4]3 years ago
7 0

Answer:

12 girls to 27 students

5 boys to 9 students

15 boys to 12 girls

Step-by-step explanation:

The first thing we have to know is that the total number of students is 27 .

- 12 girls to 27 students  is correct because there are 12 girls out of a total of 27 estudiantes

- 5 boys to 9 students is correct because it uses a common denominator that is 3  (boys: 15 / 3 = 5 and students: 27 /3 = 9)

- 15 boys to 12 girls is saying the same of the statement

The last one 3 girls to 5 boys does not have a common denominator for both factors so this last option is false .

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Solve the following equation. Then placed a correct number in the box provided. -13 - 3x = -10
Alisiya [41]

Answer:

x=-1

Step-by-step explanation:

-3x=-10+13 - -3x=3 - -3 = -1

5 0
3 years ago
What is the product 7(-6 1/8)?? Fast please <3
zvonat [6]
Convert -6 1/8 to an improper fraction: -49/8
7(-49/8) = -343/8 = -42.875 = -42 7/8
7 0
3 years ago
Horizontal stadia sights. Determine the error in distance if the uppermost portion of a 3. 0m long stadia rod is inclined 14 cm
jek_recluse [69]

The error in the distance if the uppermost portion of a 3. 0m long stadia rod is inclined 14 cm toward the observer and the rod intercept is 1. 75m on a horizontal sight is 8.167cm.

<h3>What is Tangent (Tanθ)?</h3>

The tangent or tanθ in a right angle triangle is the ratio of its perpendicular to its base. it is given as,

Tan(θ) = Perpendicular/Base

where,

θ is the angle,

Perpendicular is the side of the triangle opposite to the angle θ,

The base is the adjacent smaller side of the angle θ.

Given the uppermost portion of a that is 3.0m long stadia rod is inclined 14 cm toward the observer, therefore, the angle of inclination, θ can be written as

tan(θ)=0.14/3

θ = 2.672°

Also, the rod intercept is 1.75m, therefore, t the error in distance in the distance is,

tanθ=x/1.75

x = 1.75 tan(θ)

x = 1.75 × tan(2.672°)

x = 0.08167 m = 8.167 cm

Hence, the error in the distance if the uppermost portion of a 3. 0m long stadia rod is inclined 14 cm toward the observer and the rod intercept is 1. 75m on a horizontal sight is 8.167cm.

Learn more about Tangent (Tanθ):

brainly.com/question/10623976

#SPJ4

6 0
2 years ago
Nathan is going to invest in an account paying an interest rate of 1.9% compounded continuously. How much would Nathan need to i
Sliva [168]

Answer:

223 (rounded to closest one) actual answer would be 222.91479275

Step-by-step explanation:

use formula A=Pe^nt

$280 = Pe^0.019(12)

$280 = Pe^0.228, then evaluate the solution by isolating the variable and dividing each side by the factors which don't contain the variable.

P = 222.91479275

3 0
3 years ago
Quadratic function<br><br>I need help writing quadratic functions the zeroes are 3 and -10​
rusak2 [61]

Answer:

у = x² + 7x - 30

Step-by-step explanation:

x₁ = 3 and x₂ = -10

Use the formula    (x - x₁)(x - x₂) = 0

(x - 3)(x - (-10)) = 0

(x - 3)(x + 10) = 0

x² + 10x - 3x - 30 = 0

x² + 7x - 30 = 0

3 0
3 years ago
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