All categories

2 years ago

A student solved z + (-0.72) = -2.5 for z using the

Mathematics

2 answers:

Firlakuza [10]2 years ago

7 0

Answer:

To solve, you must use the inverse operation. In step 1, -0.72 should have been subtracted from both sides, not added. Otherwise, 0.72 should have been added to both sides, not -0.72.

Step-by-step explanation:

N76 [4]2 years ago

5 0

Answer:

Mistake in step1

Step-by-step explanation:

<u>Given</u>

z + (-0.72) = -2.5

<u>Solving in steps</u>

1. ⇒ z + (-0.72) - (-0.72) = -2.5 - (-0.72)
2. ⇒ z = - (2.5 - 0.72)
3. ⇒ z = - 1.78

The student's mistake was adding (-0.72) instead of - (-0.72) or 0.72

You might be interested in

4 A nurse is administering pain medication to

arlik [135]

The nurse should administer to the patient H. 487.5 miligrams

7 0

2 years ago

(cos x - (sqrt 2)/2)(sec x -1)=0

Darya [45]

$(\cos x-\frac{\sqrt{2}}{2})(\sec x-1)$ =0 [/tex]

$=(\cos x-\frac{1}{\sqrt{2}})(\sec x-1)$ =0 [/tex]

$\frac{(\sqrt{2}\cos x-1)}{\sqrt{2}}(\frac{1}{\cos x\ }-1)=0$

(Reciprocal Identity)

$(\frac{^{\sqrt{2}\\cos x-1}}{^{\sqrt{2}}})(\frac{1-\cos x}{\cos x})=0$

$\frac{^{(\sqrt{2}\cos x-1})}{\sqrt{2}}\frac{(1-\cos x)}{\cos x}=0$

$(\sqrt{2}\cos x-1}){(1-\cos x)}=0$ (ZeroProduct Property)

$\sqrt{2}\cos x-1=0$

$\sqrt{2}\cos x=1$

$\cos x=\frac{1}{\sqrt{2}}$

$x=\frac{\Pi }{4}$

and

$1-\cos x=0$

$\cos x=1$

$x=0$

x=0 and x= $\frac{\Pi }{4}$ are the solutions.

6 0

3 years ago

Read 2 more answers

Witch is greater 1 and 1/2 or 1 and 1/6

Trava [24]

1 1/2

because 1 1/2 equals 1 3/6. so 1 3/6 is bigger than 1 1/6.

5 0

3 years ago

Read 2 more answers

The cost c, to produce b baseball bats per day is modeled by the function c(b)=0.06b^2 - 7.2b + 390. What number of bats should

Finger [1]

You have two choices.
The minimum possible cost to operate your bat factory for a day is $390,
and there are two quantities of bats that both cost that much.

One possibility:
   Produce no bats at all per day. Zero. Nada. None.
   Cost = 0.06(0)² - 7.2(0) + 390 = $390 per day.

The other choice:
   Produce 120 bats per day.
   Cost = 0.06(120²) - 7.2(120) + 390
      = 0.06(14,400) - 7.2(120) + 390
= 864 - 864 + 390
= $390 per day.

If you produce any other number of bats in a day ... more than zero
but not 120 ... then it will cost you more than $390 to operate the factory
that day.

8 0

3 years ago

Which ordered paur is a part of the equation? 3x-y=13

choli [55]

Answer:

(6,5), (3,-4) either one of those...

7 0

2 years ago