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3 years ago

HELP

Mathematics

1 answer:

maxonik [38]3 years ago

7 0

6 should be subtracted from both sides of the equation if you want to isolate variable term

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A student has a 90, 84, and an 86 on their first 3 tests. What possible scores would the student need

Ugo [173]

The student would have to score 100% on their next test to brung their average up to 90. Here is why;
90+84+86=260
(260+?)/4=90
(260+100)/4=90
360/4=90
This is done to get the mean (or average) of a group of numbers by adding all the numbers and dividing by the amount of numbers you added together. Here it is divided by 4 because of the three tests he has taken and the test he will take.

4 0

4 years ago

Which is another way to write 6-(-7)=13

marshall27 [118]

6+7=13 is the another way to write ...

hope it is helpful.Thankyou!!!!

7 0

3 years ago

HELP ASAP

Sliva [168]

Answer: 13.74

Step-by-step explanation:

to find out the total cost we will:

13.09*(5/100)=0.65

13.06+0.65(tax)=13.74

8 0

3 years ago

A scientist has collected the following data on the population of a bacteria colony over a thirty-minute period:

blagie [28]

$\huge \bold \green{Question}$

A scientist has collected the following data on the population of a bacteria colony over a thirty-minute period:

5 minutes: 78,000

10 minutes: 234,000

15 minutes: 657,000

20 minutes: 1,784,000

25 minutes: 5,040,000

30 minutes: 14,980,000

Which type of graph would be best to use to display the growth of the colony?

A.) a bar graph

B.) a circle graph

C.) a histogram

D.) a line graph

$\huge \bold \red{Answer}$

An bar graph suits the best in this type of study because we can easily understand the growth and decrease of that particular thing which is being studied.

7 0

3 years ago

Please help, its quick I just need help with this one that Im stuck on

umka2103 [35]

$- 4k^{2} - 4k + 6 = 0 \\ \\ 4k^{2} + 4k - 6 - 4 = 0 \\ \\ 4k^{2} + 4k - 10 = 0 \\ \\ k = \frac{ - 4 + 4 \sqrt{11} }{8} \frac{ - 4 - 4 \sqrt{11} }{8} \\ \\ k = \frac{ - 1 - \sqrt{11} }{2} \frac{ - 1 + \sqrt{11} }{2}$

6 0

4 years ago