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3 years ago

7 is a solution to the equation 3n + 9 = 33. true false

Mathematics

2 answers:

attashe74 [19]3 years ago

8 0

Answer:

False

Step-by-step explanation:

bagirrra123 [75]3 years ago

5 0

Answer:

Step-by-step explanation:

3n+9=33

-9=-9

3n= 24

3n/3=24/3

n=8

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A group of friends went to a sporting event. It cost $32 for each of them what was the total cost for all of them to get in

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Andra travels 90 miles at an average speed of 70 mph.

spayn [35]

Answer:

54mph

Step-by-step explanation:

$\textsf {\underline {To find :-}}$

The average speed at 2nd departure.

⠀

$\textsf{ \underline {Given :-}}$

The speed during 90 miles travel = 70mph

The average speed during the entire journey = 63mph

The distance in second departure = 70 miles

⠀

$\textsf {\large{ \underline{ Solution :-}}}$

⠀

The distance travelled in the entire journey

= 90 + 70 = 160 miles.

⠀

Then the time taken in entire journey will be

$\sf \large = \frac{total \: distance}{average \: speed} \\ \\ \sf \large = \frac{160}{63} \\ \\ \sf \large = 2 \frac{37}{63}hours \\ \\ \sf \large = 2 \: hours \: 35 \: minutes$

⠀

Time taken at first departure

$\sf \large = \frac{distance}{speed} \\ \\ \sf \large = \frac{9 \cancel0 }{7 \cancel0} \\ \\ \sf \large = 1 \frac{2}{7} \: hours \\ \\ \sf \large = 1 \: hour \: 17 \: minutes$

⠀

Time taken in second departure

= 2 hours 35 minutes - 1 hour 17 minutes

= 1 hour 18 minutes

⠀

Speed at second departure will be

$= \sf \large \frac{distance}{time} \\ \\ \sf \large = \frac{70}{1 \frac{18}{60} } \\ \\ \sf \large = \frac{70}{1.3} \\ \\ \sf \large = 53.84 \: mph \\ \\ \sf \large = 54 \: mph$

⠀

The average speed at second departure was 54mph.

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2 years ago

There are 4 red balls, 6 white balls, and 3 green balls in a bag. If one ballis drawn from the bag at random, what is the probab

bonufazy [111]

Answer:

Step-by-step explanation:

There are 13 balls in all.

6 are white

7 are the rest

7/13

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3 years ago

ASAP PLEASE HELP which answer is right???

Otrada [13]

It’s actually a. Multiply by the square root of 2

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3 years ago