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Ahat [919]
3 years ago
5

there is a traffic light at the intersection of Pine Street and Spruce Avenue. The traffic light on Pine Street follows a cycle.

It is green for 35 seconds, yellow for 10 seconds, and read for 15 seconds. As you travel Long Pine and approach the intersection, what is the probability that the first color you see is yellow
Mathematics
1 answer:
Alex17521 [72]3 years ago
8 0
The propability is the least chance because it is the lowest time frame that it is on for


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The sum of all digits in the numbers 44, 45 and 46 is 27 because (4+4)+(4+5)+(4+6)=27. Find the sum of digits in the first 25 co
Serga [27]

Answer:

The sum of all digits in the first 25 counting numbers is 127

Hope this helps

6 0
3 years ago
The ratio of boys to girls in the 10th grade is 8 to 13. If there are 91 girls in 10th grade, then how many boys are there?
IRINA_888 [86]

Answer: There are 56 boys in the 10th grade

Step-by-step explanation:

Step 1

ratio of boys to girls in the 10th grade is 8 :13

Number of girls= 91

To find the number of boys, we first find the total number of boys and girls in the 10th grade

Step 2

Now the total ratio= 8 +13=21

Number of girls = ratio of girls/ total ratio  x  Total number of students

91=13/ 21  x  Total number of students

Total number of students =21 x 91 / 13  =147

Step 3

Therefore Number of boys =ratio of boys/ total ratio  x  Total number of student

8/21 x 147=56

6 0
3 years ago
Find a quadratic polynomial with integer coefficients which has x = 2/9, ± SQRT23/9 as its real zeros.
melomori [17]

Answer:

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

Step-by-step explanation:

Statement is incorrectly written. Correct form is described below:

<em>Find a quadratic polynomial with integer coefficients which has the following real zeros: </em>x = \frac{2}{9}\pm \frac{\sqrt{23}}{9}<em>. </em>

Let be r_{1} = \frac{2}{9}+\frac{\sqrt{23}}{9} and r_{2} = \frac{2}{9}-\frac{\sqrt{23}}{9} roots of the quadratic function. By Algebra we know that:

y = (x-r_{1})\cdot (x-r_{2}) = x^{2}-(r_{1}+r_{2})\cdot x +r_{1}\cdot r_{2} (1)

Then, the quadratic polynomial is:

y = x^{2}-\frac{4}{9}\cdot x -\frac{19}{81}

y = 81\cdot x^{2}-36\cdot x -19

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

5 0
3 years ago
What is 3 4/15 divided by (8 divided by 6 3/10)
kenny6666 [7]
8 / 6 3/10

= 8 * 10/63
=80/63

3 4/15 / 80/63

= 49/15 * 63/80

=<u>2.5725</u>

5 0
3 years ago
What is 5 5/8 + 6 1/4
dsp73
11.875 in decimal form. 
4 0
3 years ago
Read 2 more answers
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