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2 years ago

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. (5 points)

Mathematics

2 answers:

liberstina [14]2 years ago

8 0

She should have added 25 instead of subtracted 25...step 1 error

NemiM [27]2 years ago

7 0

If you would like to solve the equation -5x - 25 = 78, you should do this using the following steps:

<span>-5x - 25 = 78
</span>-5x - 25 + 25 = 78 + 25
-5x + 0 = 103
-5x = 103 /(-5)
x = 103 / (-5)
x = - 103/5 = - 20.6

The error was already made at step 1.

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3 years ago

3 exponet 8×4+9÷1×56+57

nika2105 [10]

You would use PEMDAS

But since any number divided by 1 is the number by which it is divided by then you can eliminate that. Now your problem looks like this:
8✖️4➕9✖️56➕57

Since there are no parentheses or exponents then you would multiply.
8✖️4= 32
32➕9✖️56➕57

Then multiply the other multiplication problem.
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Now you can add all of the numbers together
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4 0

3 years ago

Read 2 more answers

I’ll give brainiest

ElenaW [278]

Answer:

8.33333cm

Step-by-step explanation:

Using the formula

A=wl

Solving forw

w=A/L

=125/15

≈8.33333cm

8.3cm to the nearest tenth

correct so pls mark brainliest

7 0

1 year ago