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kogti [31]
3 years ago
9

Holly finds that (11m – 13n + 6mn) – (10m – 7n + 3mn) = m – 20n + 9mn. What error did Holly make?

Mathematics
2 answers:
jekas [21]3 years ago
6 0
She added the polynomials instead of subtracting.
notsponge [240]3 years ago
4 0

Answer:

A.)she only used the additive inverse of 10m when combining like te

Step-by-step explanation:


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The answer and how you got it
mart [117]
The answer is 12
12-(5+3)=4
4+8=12
8 0
3 years ago
Which of the following best describes the expression 7(y + 5)?
Afina-wow [57]
I dont know what you're asking, the property? That is distributive, and the answer of the expression is 7y+35
7 0
3 years ago
How do you solve this problem?
Afina-wow [57]

Answer:

x=48

Step-by-step explanation:

x-3              15

------------ = ----------

6                      2

We can use cross products to solve this problem

(x-3) *2 = 6*15

Distribute

2x-6 = 90

Add 6 to each side

2x-6+6 = 90+6

2x=96

Divide by 2

2x/2 = 96/2

x = 48

3 0
3 years ago
Santo paid $16.25 to buy 5 children tickets and 1 adult ticket. Hulda paid $24.00 to buy 4 children tickets and 3 adult tickets.
jenyasd209 [6]

Answer:

The price of an adult ticket it $5

Step-by-step explanation:

To solve this, we would find the system of equations. We would set up two equations that will represent the situation.

Let c = price per children ticket

Let a = price per adult ticket

Santo:

5c + 1a = 16.25

Hulda:

4c + 3a = 24

5c + 1a = 16.25 -> a = 16.25 - 5c

4c + 3a = 24

4c + 3(16.25 - 5c) = 24

4c + 48.75 - 15c = 24

-11c + 48.75 = 24

       -48.75   -48.75

-11c = -24.75

/-11       /-11

c = 2.25

5c + a = 16.25

5(2.25) + a = 16.25

11.25 + a = 16.25

-11.25        -11.25

a = 5

a = $5 , c = $2.25

5 0
3 years ago
Read 2 more answers
A lighthouse has a shadow that is 36 feet long. Zara is 4 feet tall, and she is standing next to the lighthouse. Zara has a shad
larisa [96]

Answer:

Explanation:

7 0
2 years ago
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