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Aleksandr-060686 [28]
3 years ago
10

Do these ratios make a proportion? 8/11 and 88/111

Mathematics
1 answer:
mixas84 [53]3 years ago
3 0

Answer:

no

Step-by-step explanation:

111 divided by 11 is 10.0909090909

and 88 divided by 8 is 11 so no it`s not proportional.

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In the DBE 122 class, there are 350 possible points. These points come from 5 homework sets that are worth 10 points each and 3
Lesechka [4]

Answer:

a) The student cannot receive an A in the class.

b) The student must score 119 in the third exams to make an A.  This is clearly not possible, since he cannot make 119 in a 100-points exam.

c) The student can make a B but he must score at least 84 in the third exam.

Step-by-step explanation:

To make an A, the student must score 315 (350 x 90%) in both home and the three exams.

The student who scored 35 (7 + 8 + 7 + 5 + 8) in the homework and 161 (81 + 80), getting a total of 196, is short by 119 (315 - 196) scores in making an A.

To make a B, the student must score 280 (350 x 80%) or higher but not reaching 315.

B ≥ 280 and < 315.

Since, the student had scored 196, he needs to score 84 and above to make a B in the last exam.

6 0
3 years ago
I don't under stand what is wrong.
MAXImum [283]

Answer:

In the first step, there is an issue when distributing the -3 to the terms inside of the parentheses. When multiplying the -3 to the -5, you would get an answer of +15, not -15.

The full correct process is:

(4m + 9) - 3(2m - 5) = 4m + 9 - 6m + 15

                                = 4m - 6m + 9 + 15

                                = -2m + 24

4 0
2 years ago
Chickens and Rabbits
trapecia [35]
x-the \ number \ of \ chickens \\ y-the \ number \ of \ rabbits \\ \\  \left \{ {{x+y=16}|(-2) \atop {2x+4y=50}} \right. \\ \\ \\ \left \{ {{-2x-2y=-32} \atop {2x+4y=50} \right.  \\..................... \\ /  \ \ \ \ \ \ \ 2y=18 => \boxed{y=\frac{18}{2}=9} \\ \\ x+y=16 \\ \\ x+9=16 \\ \\ x=16-9 \\ \\ \boxed{x=7}
3 0
3 years ago
GIVING BRAINLIEST TO WHOEVER CAN GIVE THE RIGHT ANSWER
jeyben [28]

Answer:

B ∪ C =  (-∞, ∞)

B ∩ C = [1, 7)

Step-by-step explanation:

B ∪ C:  The union of two sets or intervals is the set of elements which are in <em>either </em>set.  

B ∩ C:  The intersection of two sets or intervals is the set of elements which are in <em>both </em>sets.

<u>Interval notation symbols</u>

Square brackets [ ]: both endpoints are included in the set.

Round brackets ( ): both endpoints are excluded in the set.

Round, square ( ]: left endpoint is excluded and right endpoint is included in the set.

Square, round [ ): left endpoint is included and right endpoint is excluded in the set.

Given:

  • B = {z | z ≥ 1}
  • C = {z | z < 7}

Therefore,

B = [1, ∞)

C = (-∞, 7)

Therefore,  B ∪ C =  (-∞, ∞)

As z is either less than 7, or equal to or more than 1 then the intersection is:

B ∩ C = {z | 1 ≤ z < 7} = [1, 7)

6 0
2 years ago
Read 2 more answers
Flying against the wind, an airplane travels 4620km in 6 hours. Flying with the wind, the same plane travels 3750km in 3 hours.
koban [17]
Let us call the rate as velocity. Now the velocities of the plane and of the wind are:
v_{p} and v_{w}:
Now

case 1: v_{p} -  v_{w} =4620/6=770 km/h

case 2: v_{p} +  v_{w} =3750/3=1250 km/h

from equation 2: v_{w} = 1250 -  v_{p}
substitute in equation 1:
v_{p} - 1250 + v_{p} =770 v_{p} = 1010 km/h
Which is your velocity in still air (without wind)
Substituting back in:
v_{w} = 1250 -  v_{p}
you get:
v_{w} = 1250-1010 = 240 km/h
which is the wind velocity



7 0
3 years ago
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