All categories

2 years ago

Erica solved the equation -5x - 25 = 78; her work is shown below. Identify the error and were it was made

Mathematics

1 answer:

Nata [24]2 years ago

7 0

Answer:

Step-by-step explanation:

It's A because she subtracted a negative and that only make a bigger negative where she should have added

You might be interested in

How many quarts of water must be added to 3 gallons of soup that is 60% chicken broth to make the soup 40% chicken broth

Nuetrik [128]

Answer:

6 quarts

Step-by-step explanation:

60% 3 gallons = 1.8 gallons of broth

water = 0% broth

1.8=1.2+0.4x

0.6=0.4x

x=1.5

1.5 gallons = 6 quarts

8 0

3 years ago

Use the drop-down menus to complete the statements to match the information shown by the graph

Tresset [83]

Answer:what are answer choices

Step-by-step explanation:

4 0

2 years ago

C=2πr Solve for r R=2π/C R=C/2π R=2C/π R=π/2C

Evgen [1.6K]

I hope this helps you

2pi.r=C

r=C/2pi

7 0

3 years ago

In a sample of n = 6 scores, 5 of the scores are each above the mean by one point. Where is the 6th score located relative to th

den301095 [7]

The mean of a dataset is the sum of all data elements divided by the count of the elements.

The location of the 6th score relative to the mean is 5 points below the mean

Let:

$\bar x \to$ Mean

$a \to$ 5 scores

$b \to$ 6th scores

Given that:

$n = 6$

The 5 scores that are 1 above the mean implies that:

$a = \bar x + 1$

The mean of a dataset is calculated using:

$\bar x = \frac{\sum x}{n}$

So, we have:

$\bar x =\frac{5a + b}{6}$

$\bar x =\frac{5(\bar x + 1) + b}{6}$

Open brackets

$\bar x =\frac{5\bar x + 5 + b}{6}$

Multiply both sides by 6

$6\bar x =5\bar x + 5 + b$

Make b the subject

$b = 6\bar x -5\bar x - 5$

$b = \bar x - 5$

This means that the 6th score is 5 points below the mean