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emmainna [20.7K]
3 years ago
10

7m-9n for m=7 and n=5

Mathematics
2 answers:
Svet_ta [14]3 years ago
8 0

Answer:

4

Step-by-step explanation:

7*7-9*5

49-45

4

Natali5045456 [20]3 years ago
8 0

Answer:

The answer is 4

Step-by-step explanation:

7(7)-9(5) Multiply

49-45 subtract

4

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The number of students who chose lunch was 5 more than the number of students who chose breakfast. Write a system of linear equa
Papessa [141]

Answer:

The system of linear equations are y=5+x and  x+y=25

Step-by-step explanation:

Given : The number of students who chose lunch was 5 more than the number of students who chose breakfast. Let x represent the number of students who chose breakfast and y represent the number of students who chose lunch.

(50 students picked, 25 picked dinner the rest picked lunch and breakfast)

To find : Write a system of linear equations that represents the numbers of students who chose breakfast and lunch ?

Solution :

The number of students who chose breakfast be 'x'

The number of students who chose lunch be 'y'.

The number of students who chose lunch was 5 more than the number of students who chose breakfast.

i.e. y=5+x

Now, Total student were 50 and 25 picked dinner the rest picked lunch and breakfast i.e. 25.

So, x+y=25

Therefore, the system of linear equations are y=5+x and  x+y=25

4 0
3 years ago
What is the area of a regular nonagon (9 sides) with side length of 15 cm and apothem of 20.6 cm? Round the answer to the neares
Triss [41]
We know that

<span>The nine radii of a regular Nonagon divides into 9 congruent isosceles triangles
</span>therefore
[the area of <span>a regular nonagon]=9*[area of isosceles triangle]

</span>[area of isosceles triangle]=b*h/2------> 15*20.6/2----> 154.5 cm²
so
[the area of a regular nonagon]=9*[154.5]------> 1390.5 cm²

the answer is
1390.5 cm²

5 0
3 years ago
Divide. Write your answer in simplest form. 6/7 ÷ 5/21​
Serjik [45]
The answer is 8/5.
To divide fractions, flip the second fraction and multiply.
For example,
= 6/7 • 21/5
= 126/35
Simplify by dividing both sides by 7 to get your answer.
= 8/5
5 0
3 years ago
4,3,5,9,12,17,...what is the next number?
77julia77 [94]

Answer:

The next number is going to be 21

6 0
3 years ago
Read 2 more answers
PLS HELP ME I NEED HELP ITS DUE RN
lina2011 [118]

Answer:

Step-by-step explanation:

It's 4

3 0
2 years ago
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