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3 years ago

-3(3x+8)>-9x+4 always or never true?

Mathematics

1 answer:

labwork [276]3 years ago

6 0

-3(3x+8)>-9x+4
-9+8>-9x+4
+9x +9x
8>4

Answer:Always

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20 Fuji apples cost $12. How many Fuji apples can you buy for $3?

ryzh [129]

Answer:

5 apples

Step-by-step explanation:

First, we must find the cost of one apple

12/20 = the cost of one apple

= $0.60

Then, we divide 3 by the price of one apple

3/0.6 = amount of apple we can buy

= 5

4 0

2 years ago

Find the area of the shape shown below

Arlecino [84]

Answer: 12.5

Step-by-step explanation:

area= 1/2 (2.5+7.5) 2.5

sorry if its not clear enough i dont really know how else to explain it

7 0

2 years ago

Read 2 more answers

Solve for x. Show your work. -12x < -12

Eva8 [605]

Step-by-step explanation:

-12x < -12

-12x/-12= x

-12/-12= 1

x < 1

3 0

2 years ago

Read 2 more answers

Ellie is painting the ceiling of a circular gazebo. The diameter is 13.5 meters. How much are will the paint need to cover?

bogdanovich [222]

Using 3.14 it would be 143.06625

using the pie symbol it would be 143.138815279

8 0

3 years ago

You took 3 test. Your median score was 80, your mean score was 79, and the range was 17, what were your first 3 test scores ?

Monica [59]

Answer:

80, 70 and 87

Step-by-step explanation:

-Range is mathematically defined as the difference between the largest and smallest data point in a data set.

-Given the mean=79, median=80 and the range is 17.

#let a be the largest score and b be the smallest score:

$a-b=17\\\\\bar x=79=\frac{\sum{x_i}}{3}\\\\\therefore x_i=79\times 3=237\\\\$

The sum of the 3 scores is equivalent to the 237.

#we subtract the given median and equate using range to solve for a and b;

$a+b+80=237\\\\a+b=157\ \ \ \ \ \ ...i\\\\a-b=17\ \ \ \ \ \ ...ii\\\\\#from \ ii\\a=17+b\\\\\therefore\\17+b+b=157\\\\2b=140\\\\b=70\\\\a=17+b=17+70=87$

Hence, the test scores are 80, 70 and 87

5 0

3 years ago