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Andreyy89
2 years ago
12

Maria said that -4n + 3 +9n - 4 is equivalent to 4n. What error did maria likely make?

Mathematics
2 answers:
ivann1987 [24]2 years ago
8 0
Maria combined all of the factors, which were not all like terms. She should’ve did -4n+9n and 3-4 to get 5n-1
Vsevolod [243]2 years ago
4 0
5n + -1 ( i think not sure. dont trust me
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The length of a rectangle is 3 inches more than three times the width. the perimeter is 94 inches. find the length and width.
Zina [86]
Let length be (l) and width be (w).

According to the question, l=3w+3......equation1
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Solve these two equations, you get your answer.
l=36
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3 0
2 years ago
The radius of a cylinder is 5" and the lateral area is 70 sq. in. Find the length of the altitude. 2.8" 7" 14"
algol13
The correct question is
<span>The radius of a cylinder is 5" and the lateral area is 70pi sq. in. Find the length of the altitude.
</span>
we know that

[surface lateral area]=(2*pi*r)*height
height= [surface lateral area]/(2*pi*r)
surface lateral area=70*pi in²
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height= [70*pi]/(2*pi*5)------> 7 in

the answer is
7 in
5 0
2 years ago
When solving negative one over five -1/5 (x − 25) = 7, what is the correct sequence of operations
aleksandr82 [10.1K]

The solution would be like this for this specific problem:

 

\left( { - 5} \right)&#10;\cdot \left( { - \frac{1}{5}} \right) \cdot \left( {x - 25} \right) = 7 \cdot&#10;\left( { - 5} \right)

 

 

\left( { - 5} \right)&#10;\cdot \left( { - \frac{1}{5}} \right) = 1

 

The correct sequence of operations when solving negative one over five (x − 25) = 7 would be multiply each side by −5, and adding 25 to each side.

5 0
2 years ago
Enya walked 2 km 309 m from school to the store. Then, she walked from the store to her home. If she
serg [7]
Her home was 2 km 691 m from the store. (5 km = 5000m --> 5000-2309)
6 0
2 years ago
Peter paid $79.80 for renting a tricycle for 6 hours. What was the rate per hour for renting the tricycle? (Input only numeric v
defon

Answer:

13.30

Step-by-step explanation:

$79.80 / 6 hours = $13.30

3 0
2 years ago
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