WILL MARK BRAINLIEST TO THE FIRST PERSON OR WHO IS RIGHT The work of a student to solve a set of equations is shown:

Equation 1: m = 8 + 2n
Equation 2: 6m = 4 + 4n

Step 1: −6(m) = −6(8 + 2n) [Equation 1 is multiplied by −6.]
6m = 4 + 4n [Equation 2]
Step 2: −6m = −48 − 12n [Equation 1 in Step 1 is simplified.]
6m = 4 + 4n [Equation 2]
Step 3: −6m + 6m = −48 − 12n + 4n [Equations in Step 2 are added.]
Step 4: 0 = −48 − 8n
Step 5: n = −6

In which step did the student first make an error?
Step 3
Step 5
Step 4
Step 2

Step 3

Step-by-step explanation:

Step 3 should be:

−6m + 6m = −48 − 12n + 4n + 4

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  Step 3

Step-by-step explanation:

When the equations are added in step 3, the result should be ...

  -6m +6m = -48 -12n +4 +4n

In the work shown, the (+4) was left out in Step 3.

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When the work is properly continued, it becomes ...

  Step 4:  0 = -44 -8n . . . . [step 3 is simplified]

  Step 5: n = -5.5 . . . . . . .  [step 4 is divided by -8 and 5.5 subtracted]

  Step 6: m = -3 . . . . . . . . . [n is substituted into Equation 1]

And the solution is (m, n) = (-3, -5.5).

sec ф = 5/3 (quadrant 4)

let x = base

y = perp

z = hypotenuse

sec ф = hypotenuse/base = 5/3

⇒ z = 5 and x = 3

finding y:

z² = x² + y²

5² = 3² + y²

y² = 25-9

y² = 16

y = 4

now finding all other geometric functions of theta:

sin ф = y/z = 4/5

sin ф = -4/5 (sin is negative in the 4th quadrant)

cos ф = x/z = 3/5

cos ф = 3/5 (cos is positive in 4th quadrant)

tan ф = y/x = 4/3

tan ф = -4/3 (tan is negative in 4th quadrant)

cosec ф = z/y = 5/4

cosec ф = -5/4 (cosec is negative in the 4th quadrant)

cot ф = x/y = 3/4

tan ф = -3/4 (tan is negative in 4th quadrant)

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: