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2 years ago

Which statements are true? Select MORE THAN ONE correct answer.

Mathematics

2 answers:

DochEvi [55]2 years ago

7 0

Statements 1 and 4 are correct. Let me know if you need more of an explanation. :)

Anastasy [175]2 years ago

6 0

Answer:

A and D.

Step-by-step explanation:

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in a class 60% of the students are girls there are 18 girls in the class. how many students are in the class and how many boys a

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There are 30 students and 12 boys

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Write an equation for a line perpendicular to y = -5x – 4 and passing through the point (15,5)

stiv31 [10]

Answer:

y=1/5x+2

Step-by-step explanation:

In perpendicular lines the slopes are negative reciprocals so the slope of other line is 1/5x

And they intersect at (15,5) to find the y intercept(b)

y=1/5x+b

5=(1/5)(15)+b

5=3+b

b=2

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2 years ago

you have been asked to build a scale model of your school out of toothpicks . Imagine your school is 30ft tall . your scale is 1

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3 years ago

If The veterinarian weighs Jim's two dogs. His collie weighs 40 pounds. His terrier weighs 288 ounces. What is the total weight

Elodia [21]

Answer: 58

Step-by-step explanation: You simply convert the 288 ounces into pounds.

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6 0

2 years ago

The area of a rectangular piece of cardboard is represented by

Liula [17]

This question is solved applying the formula of the area of the rectangle, and finding it's width. To do this, we solve a quadratic equation, and we get that the cardboard has a width of 1.5 feet.

Area of a rectangle:

The area of rectangle of length l and width w is given by:

$A = wl$

w(2w + 3) = 9

From this, we get that:

$l = 2w + 3, A = 9$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}$

$\Delta = b^{2} - 4ac$

In this question:

$w(2w+3) = 9$

$2w^2 + 3w - 9 = 0$

Thus a quadratic equation with $a = 2, b = 3, c = -9$

Then

$\Delta = 3^2 - 4(2)(-9) = 81$

$w_{1} = \frac{-3 + \sqrt{81}}{2*2} = 1.5$

$w_{2} = \frac{-3 - \sqrt{81}}{2*2} = -3$

Width is a positive measure, thus, the width of the cardboard is of 1.5 feet.

Another similar problem can be found at brainly.com/question/16995958

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2 years ago