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3 years ago

Simple 9th grade math

Mathematics

1 answer:

Liono4ka [1.6K]3 years ago

5 0

Answer:

-1078

Step-by-step explanation:

To find the nth term in an arithmetic sequence we use the following formula

aₙ=a₁+(n-1)*d

Where a₁ is the first time, and d is the common difference (in this case -20)

So we have

2+(55-1)*-20

2+(54)*-20

2-1080

-1078

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On a partly cloudy day, Derek decides to walk back from work. When it is sunny, he walks at a speed of s miles/hr (s is an integ

Setler [38]

Answer: $\frac{1}{7}$

Step-by-step explanation:

Given

sunny day speed= s mph

Rainy day speed=s+1 mph

Derek average speed =2.8 miles/hr

s<2.8<s+1

so on sunny day speed must be 2 mph

and on rainy day speed must be 3 mph

$v_{avg}=\frac{distance}{time\ taken}$

Let x be the distance traveled in sunny and y be the distance traveled in rainy weather

$2.8=\frac{x+y}{\frac}{x}{2}+\frac{y}{3}}$

Let $\frac{x}{y}=z$

$2.8=\frac{z+1}{\frac{z}{2}+\frac{1}{3}}$

$z=\frac{1}{6}$

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3 years ago

Write how you would explain the following problem using the order of operations to a 5th grader?

jek_recluse [69]

Answer:

PEMDAS

Step-by-step explanation:

Use PEMDAS. Parenthesis, Exponents, Multiplication/Division, Addition/Subtraction.

Start with your parenthesis, which is (9-6). This comes out to 3. Your equation should now look like 2+(3)x5/3

Then, go to your exponents. Since we don't have any, we skip this step.

Now, we look from left to right for any multiplication symbols or division symbols. Finding (3)x5, this comes out to 15. Now rewrite your equation, if should look like this: 2+15/3.

Repeat the last step and find your division symbol, and find this 15/3. That comes out to 5.

The last step is finding addition or subtraction symbols, and since there's only two numbers left we can just solve the problem from here.

2+5=7.

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3 years ago

What is mTVZ? Show your work.

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Answer:I DIDNT UNDERSTAND CAN YOU STILL MARK ME THE BRANIEST

Step-by-step explanation:

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3 years ago

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Colt1911 [192]

Answer:

Step-by-step explanation:

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3 years ago

The explicit rule for a sequence is

pishuonlain [190]

For an explicit formula in its simplified form, we must evaluate the first two terms.

For $a_n=48-11n$ , $a_1=48-11=37$ , and $a_2=48-22=26$ . We see that the common difference is $37-26=-11$ , and $a_1=37$ , so we write,
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