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Strike441 [17]
2 years ago
10

Find the value of x if the arithmetic mean of 3 and 3x+5 is 8?

Mathematics
1 answer:
mina [271]2 years ago
8 0

Answer:

1

Step-by-step explanation:

3x+5=8

Group like terms

3x=8-5

3x=3

Divide both side by the co-efficient of x which is 3

3x/3=3/3

x=1

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Pete and his friend Danny volunteered to bring sandwiches for lunch at a homeless shelter. They bought 7 loaves of bread. Each l
Gnesinka [82]

Answer:

63 sandwiches

Step-by-step explanation:

Pete and his friend Danny volunteered to bring sandwiches for lunch at a homeless shelter

They brought 7 loaves of bread

Each loaves have 18 slices

They used 2 slices each to make the sandwich

The first step is to calculate the total number of slices

Sinces 7 loaves of bread are used and each of them contain 18 slices then, the total number of slices can be calculated as follows

= 7 ×18

= 126 slices

Therefore since 2 slices of bread is used to make one sandwich then, the number of sandwiches that was made can be calculated as follows

= 126/2

= 63

Hence 63 sandwiches were made for the shelter

8 0
3 years ago
Michael is making a backdrop for the school play.He bought 4 rolls of material to use.He used 27 square feet of material for the
charle [14.2K]
27+5= 32 total square feet.
32/4= 8 square feet per roll.
7 0
3 years ago
Suppose you have a bag of colored plastic disks and you choose one without looking. The probability the disk you choose is yello
Ostrovityanka [42]

Answer: 0.2

Step-by-step explanation:

Since the probability that the disk chosen is 5/25, thus can be written in decimal as 0.2.

This means that in a bag of 15 colored plastics discs with different colors, the probability of picking a yellow colored disk is 0.2.

8 0
3 years ago
How can I solve this proof?? PLZ HELP I DONT UNDERSTAND!! Thanks !!
love history [14]

Hello from MrBillDoesMath!

Answer:

See below


Discussion:

Triangles BAD and BCD are congruent by the SAS postulate.

          * Side AD = DC because BD is the perpendicular bisector  of AC.

          * Angle ADB and CDB are both right angles, and hence equal, because

            BD is the perpendicular bisector of AC)


Corresponding parts of congruent triangles are equal so angle BAD = angle BCD,  which was to be proven.


Regards,  

MrB

8 0
3 years ago
Solve the equation for x. x ^3 = 27 The solution of the equation is x
PSYCHO15rus [73]
The answer is 3
3x3x3 is 27

Hope this helps
5 0
3 years ago
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