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inna [77]
3 years ago
11

Which equality statement is FALSE? A) 1 = −[−(1)] B) −(−14) = 14 C) 7 = −[−(7)] D) −1 = −(−1)

Mathematics
1 answer:
Elodia [21]3 years ago
8 0
D is false.

-1 = -(-1)

When you negate the negative on the left, you get a positive 1, not a negative 1.
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A company has a break even point in revenue at 800,000. Variable costs are 60% of the revenue. If the company lost 40,000 last y
Norma-Jean [14]

Answer: A company has 440000 as revenue.

Step-by-step explanation:

Total revenue a company earned = 800000

Variable costs = 60% of revenue

So , variable costs becomes

\frac{60}{100}\times 800000\\=480000

Now, company lost = 40000

So, remaining revenue becomes

480000-40000=440000

So, a company has 440000 as revenue.

6 0
3 years ago
Jared wants to save $100 to buy a tennis racket. He saves $8 each week, and his mother gives him an extra $0.25 for each dollar
scoundrel [369]
If he saves $ 8 each week...and his mom is giving him 0.25 for each dollar, then he will have (8 + 0.25(8)) = 8 + 2 = $ 10 per week

10w = 100.....with w being the number of weeks
w = 100/10
w = 10...so he will have it in 10 weeks <==
5 0
3 years ago
Cholesterol level has a Normal distribution N(170,30), find the first quartile.
geniusboy [140]

Step-by-step explanation:

In statistics, the quartile is a measurement of the spread of values within a dataset above and below the mean via a division of the distribution into four defined intervals. A quartile partitions the data at three points within the distribution.

  • 25% of the data lies below the lower or first quartile, denoted as Q_{1}.

  • 50% of the data lies below the median or second quartile, denoted as Q_{2}.

  • 75% of the data lies below the upper or third quartile, denoted as Q_{3}.

Thus, logically, we know that the remaining 25% of the data lies above the third quartile.

As shown in the figure below, the score that defines the first quartile of the defined normal distribution is the same as the score that, when evaluated in the cumulative density function, \Phi, gives 25% of the area under the bell curve.

To find this z-score, we can use the help of the NORM.INV function in Microsoft Excel, which obtains the inverse of the normal cumulative distribution and the syntax, type into a cell, is as follows:

                                     =\text{NORM.INV(0.25, 170, 30)}

which gives you the value 149.77  (2 s.f.).

This means that 25% of the values of cholesterol levels lie below 149.77.

7 0
3 years ago
Like the other qs I asked, I know this is alot but I really need help. I can admit I am terrible at math, like totally terible,
Romashka-Z-Leto [24]
Wait so Brainly doesn’t have answers for this ?
6 0
3 years ago
A student’s performance in Test 1 and Test 2 for all the 6 subjects has to be compared graphically for the current academic year
Debora [2.8K]

Answer:

Double Bar Graph

Step-by-step explanation:

A double bar graph would be suitable to show the performance of test 1 and 2 in all 6 subjects

3 0
3 years ago
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