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3 years ago

Which expression can be used to check the answer to 56➗(-4)=-4?

Mathematics

1 answer:

Drupady [299]3 years ago

8 0

Answer:

-14 × -4

Step-by-step explanation:

56 ÷ -4 = -4

To check your answer to a problem you will start with the answer you got when you divided times the answer to the problem, will give you the number you started with.

-14 × -4 = 56

You might be interested in

What is the number of possible outcomes when a coin is tossed one time

Salsk061 [2.6K]

Answer:

Step-by-step explanation:

the coin could be heads or tails, but knowing me prolly 3 because I would lose the coin when I flip it.

6 0

3 years ago

Read 2 more answers

Use an algebraic approach to solve the problem.

qaws [65]

Answer:

Her first exam score was a 78, her second exam score was a 89, and his third exam score was a 94.

Step-by-step explanation:

Use the formula for the mean: sum of elements / number of elements

Let x represent her first exam score.

Her second exam score can be represented by x + 11, since it was 11 points better than her first.

Her third exam score can be represented by (x + 11) + 5, since it was 5 points better than her second.

Plug in all of these expressions into the mean formula. Plug in 87 as the mean, and plug in 3 as the number of elements (since there are 3 scores):

mean = sum of elements / number of elements

87 = ( (x) + (x + 11) + (x + 11) + 5 ) / 3

Add like terms and solve for x:

87 = (3x + 27) / 3

261 = 3x + 27

234 = 3x

78 = x

So, her first score was a 78.

Find her second score by adding 11 to this:

78 + 11 = 89

Find her third score by adding 5 to the second score:

89 + 5 = 94

Her first exam score was a 78, her second exam score was a 89, and his third exam score was a 94.

6 0

3 years ago

Which of these describes the equation –18x + 9y = –416?

Minchanka [31]

Answer:

We conclude the equation is linear because it can be rewritten in the form $y = mx + b$ .

Hence, option D is correct.

Step-by-step explanation:

The slope-intercept form of the line or linear equation

$y = mx+b$

where

$m$ is the slope

$b$ is the y-intercept

Important Tip:

The graph of a linear equation is always a straight line.

Convert the given equation in the slope-intercept form

$18x + 9y = -416$

subtract 18x from both sides

$18x+9y-18x = - 18x-416$

simplify

$9y = -18x - 416$

divide both sides by 9

$y=-2x-\frac{416}{9}$

Now, comparing the equation $y=-2x-\frac{416}{9}$ with a slop-intercept form of linear equation

The slope m = -2

The y-intercept b = -416/9

Therefore, we conclude the equation is linear because it can be rewritten in the form $y = mx + b$ .

From the attached graph, is also clear that the graph of the equation $y=-2x-\frac{416}{9}$ is a straight line.

Hence, option D is correct.

3 0

3 years ago

Read 2 more answers

15 feet 10 inches is how many inches in all

Lady bird [3.3K]

Answer:

190 inches

Step-by-step explanation:

(15x12)+10=190

6 0

2 years ago

Terry sees this offer. 35% off refurbished phone, now only £78. What was the orginal price?

KengaRu [80]

35% off means that now it costs 100%-35%=65% of the original price

£78 ---- 65%
x------100%

x=78*100/65=120£

or
part/whole=0.65
78/whole=0.65
whole =78/0.65 =120 £

8 0

3 years ago