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PilotLPTM [1.2K]
3 years ago
10

Find the incorrect step in each solution and explain whit it is incorrect.

Mathematics
1 answer:
julsineya [31]3 years ago
3 0

Answer:

Step-by-step explanation:

Mai:

She subtracted 5x instead of distributing. This is incorrect, because since it is in ( ), it has to be multiplied by 3.

Correct: 3(5x + 9) = 15x + 27

12x + 3 = 15x + 27

Noah:

Added 15x instead of subtracting. This is incorrect, because to combine like terms on each side you would add a negative number and subtract a positive number.

Correct: 12x + 3 = 15x + 27

12x - 15x = 27 - 3

-3x = 24

x = 24 / -3

x = -8

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Solve the math problem please
koban [17]

Answer:

Option D

Step-by-step explanation:

Collect all like terms and Calculate

-10x-7x= -17x

20-54= -34

Divide

-17x < -34

x>2

6 0
3 years ago
Read 2 more answers
What is the system of solution to y-x=-13 and -4x+3y=-51
poizon [28]
Equation 1 ==> y - x = -13
Equation 2 ==> -4x + 3y = -51
3(y - x) = 3(-13)
Equation 3 ==> 3y - 3x = -39

Equation 2 - 3
= (3y - 3y) + ( -4x - (-3x) ) = -51 - (-39)
-x = -12
x = 12

Substitude x into equation 1
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8 0
3 years ago
The water reaches a max height when the horizontal distance from the firefighter to the building is approximately __m. Round to
elena-s [515]

The horizontal distance from the firefighter at which the maximum height of water occurs is 10.83m

<u>Explanation:</u>

Given:

h(x) = -0.026x² + 0.563x + 3

where,

h(x) is the height of the water

Initial speed, u = 14m/s

angle, θ = 30°

(a)

Horizontal distance = ?

h(x) = ax² + bx + c

the vertex is found at x = -b/2a

where,

x = distance to the maximum height

As compared to the equation given:

a = -0.026

b = 0.563

Thus,

x = \frac{-0.563}{2 X -0.026} \\\\x = \frac{0.563}{0.052}\\ \\x = 10.83m

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3 0
3 years ago
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You have the right answer. n + p = m because inside angle + inside angle = outside angle.
5 0
3 years ago
In the Cartesian Coordinate System, the intersection of the axis is called the origin. What is this called in the Polar coordina
Nookie1986 [14]

it's plural so axes*

and in pilar coordinates, the axes are circular so they never intersect but the centre point is still called origin.

4 0
3 years ago
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