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3 years ago

13

Ellen takes a multiple choice quiz that has 5 questions with 4 answers choices for Each question. What is the probability that s

he will get exactly 2 answers correct by guessing?

1 answer:

DedPeter [7]3 years ago

7 0

10%

5*4=20
2/20=1/10
1/10=0.10=10%

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6m - 8 = 2 + 9m - 1 Show your work and answer.

Nookie1986 [14]

6m-8 = 2+9m-1

6m-9m = 2+8-1

-3m=9

m = -3

3 0

3 years ago

10. Which travels faster, a car that goes 200 miles in 2 hours, or a

umka21 [38]

<h2>Answer:</h2>

<em>Question 10. </em><u><em>The truck travels faster</em></u><em>.</em>

<em>Question 11. </em><u><em>The slug travels faster</em></u><em>.</em>

<h2>Step-by-step explanation:</h2>

<h2><u>Question 10.</u></h2>

<u />

<h3>1. Find the velocity of each vehicle.</h3>

$Speed=\frac{distance}{time}$

$Speed_{Car} =\frac{200(miles)}{2(hours)}=100mi/h. \\\\ Speed_{Truck} =\frac{300(miles)}{2.5(hours)} =120mi/h.\\ \\$

<h3>2. Compare the velocities.</h3>

$Speed_{Car} =100mi/h < Speed_{Truck} =120mi/h.$

<em>Hence, the trucks travels faster than the car.</em>

<em></em>

<u>-------------------------------------------------------------------------------------------------------</u>

<em></em>

<h2><u>Question 11.</u></h2>

<em>Apply the same method as in question 10.</em>

<h3>1. Find the velocity of each body.</h3>

<em /> $Speed_{snail}=\frac{20(cm)}{(3 min)} =6.67cm/min.\\ \\Speed_{slug}=\frac{15(cm)}{(2 min)} =7.5cm/min.$

<h3>2. Compare the velocities.</h3>

$Speed_{snail}=\frac{20(cm)}{(3 min)} =6.67cm/min < Speed_{slug}=\frac{15(cm)}{(2 min)} =7.5cm/min.$

Hence, the slug travels faster.

6 0

1 year ago

Factor the following trinomials. Place each factor in its own blank. You do NOT need to put

den301095 [7]

Answer:

(x+9)(x+4)

Step-by-step explanation:

We wish to factor x²+13x+36 into the form of (x+p)(x+q) where p+q=13 and pq=36.

Factors of 36: 1, 2, 3, 4, 6, 9, 12. 18, 36

Notice that 9+4=13 as 9*4=36, which satisfies the values of p and q

This means x²+13x+36 can be factored into (x+9)(x+4)

7 0

2 years ago

What is .4% as a fraction or mixed number in simplest form

elena-14-01-66 [18.8K]

Answer: 2/5%

Step-by-step explanation: First, convert 0.4 into 4/10. Then, divide the numerator and the denominator by 2. You should get 2/5, which can’t be simplified any more. Voila!

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2 years ago

A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y)

joja [24]

Answer:

we can test score by making some equations which us to test score so please do it

8 0

2 years ago