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2 years ago

Math plz help it's hard (8th grade math)

Mathematics

2 answers:

Mrac [35]2 years ago

8 0

This is what I got I dont know if It should be an equation but that's all i can get to, gl

atroni [7]2 years ago

7 0

Answer: yes i got the same thing as the other person

Step-by-step explanation:

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A motorcycle travels 325 miles at a speed of 50 mph. How much time did it take?

Blizzard [7]

Answer:

6 hrs and 30 minutes

Step-by-step explanation:

Because math:

325/50=6.5

4 0

2 years ago

Read 2 more answers

i am greater than 1/4 but less than 4/10. i am a decimal rounded to the hundredths place with the digit 1 in my hundredths place

lions [1.4K]

The answer is 0.3. because it's between 0.25 and 0.4 rounded

7 0

2 years ago

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Sodium-24 has a half-life of 15 hours. how many grams of a 900 g sample will remain after 90 hours

raketka [301]

Answer: Option 'B' is correct.

Step-by-step explanation:

Let the initial concentration be

$N_0=900\ g$

Let concentration after t= 90 hours be N

Since we have given that Sodium-24 has a half life of 15 hours i.e.

$t_{\frac{1}{2}}=15$

So, According to question,

$\text{ Number of half lives }=\frac{t}{t_{\frac{1}{2}}}\\\\\text{ Number of half lives }=\frac{90}{15}\\\\\text{ Number of half lives }=6$

As we know that

$\frac{N}{N_0}=(\frac{1}{2})^n\\\\N=N_0\times (\frac{1}{2})^n\\\\N=900\times (\frac{1}{2})^6\\\\N=\frac{900}{64}\\\\N=14.0625\ g$

Hence, Option 'B' is correct.

4 0

2 years ago

Shannon is making a rocket by folding a paper. She needs a piece of paper with a area of 84 square inches.Shannon has a piece of

slamgirl [31]

Answer:

the 42 width of the paper need

8 0

2 years ago

Can someone please help me on this?

Elza [17]

Answer:

First angle: 27

Second angle: 135

Third angle: 18

Draw a triangle with one obtuse angle and 2 acute angles.

Step-by-step explanation:

Determine the variables:

first angle: f

second angle: s

third angle: t

Write an equation for the second angle:

s=5f

Write an equation for the third angle:

t=2/3f

Write an equation for the total angle measurements:

s+t+f=180

Substitute them and solve

5f+2/3f+f=180

f=27

5(27)=135=s

2/3(27)=18=t

First angle: 27

Second angle: 135

Third angle: 18

6 0

2 years ago