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3 years ago

Please help!!!!!!!!!!!!!!!!

Mathematics

1 answer:

krek1111 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

There are 5+6+4+7+5+3 = 30 total

Girl who likes burgers = 6

P(Girl who likes burgers) = 6/30 = 1/5 = .2

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A teacher keeps track of the number of students that participate at least three times in an optional study session each year. He

kifflom [539]

Answer:

Step-by-step explanation:

just guessed it

8 0

3 years ago

An arch in the shape of the upper half of an ellipse is used to support a bridge that is to span a river 20 meters wide. The hei

MatroZZZ [7]

Title:

<h2>Check the explanation.</h2>

Step-by-step explanation:

The standard form of an ellipse is $\frac{x^{2} }{a^{2} } + \frac{y^{2} }{b^{2} } = 1$ .

The span of the river is 20 meters. As per the given condition, y-axis will pass through the middle point of the river. That is why, the value of a will be $\frac{20}{2} = 10$ .

Since the height of the arc is 6, the value of b is 6.

The equation of the arc will become $\frac{x^2}{{10}^2} + \frac{y^2}{6^2} = 1$ .

8 0

4 years ago

What is the answer (6√2)(-3√5)

alexgriva [62]

Solution:

$- 18 \sqrt{10}$

<h3>Step-by-step explanation:</h3>

<h3>1. Apply rule : a(-b) = -ab</h3>

$= - 6 \sqrt{2} \: \: • \: \: 3 \sqrt{5}$

2. Apply radical rule : $\sqrt{a} \sqrt{b} = \sqrt{ab}$ , $a \geqslant 0$ , $b$

$= 6 \sqrt{2 \: • \: 5} \: • \: 3$

<h3>3.Multiply the numbers : 2 • 5 = 10</h3>

= $6 \sqrt{10} •3$

<h3>4.Multiply the numbers : - 6 • 3= - 18</h3>

$= - 18 \sqrt{10}$

7 0

2 years ago

N f(x) = -3x+4, find f(-2)

hoa [83]

Answer: f(-2) = 10

Step-by-step explanation:

To fin f(-2), we must plug -2 in for x

y = -3x + 4

y = -3 (-2) + 4 = 6 + 4 = 10

4 0

3 years ago

Let vectors Ā = (2,1,-4), B = (-3,0,1), and C = (-1,-1,2).

Aleksandr [31]

<span>Vector Ā * Vector B = -10. This is the scalar dot product and can calculated by taking the magnitude in the x, y, and z of the two vectors and the operation is done.
The angle </span> Ɵ AB between vector Ā and vector B is 133.635°.
<span>2 Vector B * 3 Vector C = -1. A similar approach is done for this one.</span>

8 0

3 years ago