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3 years ago

Help asap!! pls show all steps for each question TYSM

Mathematics

1 answer:

cricket20 [7]3 years ago

3 0

Answer:

1) <

2) >

3) =

4) 138.75%

5) 4.4%

6) 87%

7) 166

8) 119%

9) 22.5%

10) I don't know, sorry!

11) I can't do the rest in my head I am sorry

Step-by-step explanation:

1) Because 25% is 1/4, not 1/5; 20% would be 1/5, for future reference

2) Move the decimal to the right twice, then put a percent sign!

3) I'm actually not 100% sure on this one, but I believe it's equal to, though. I am so sorry I couldn't get you a clear enough answer.

4) 75 ÷ 100 (may wanna use a calculator)

I am running outta time I am SO SORRY :( just remember on 4-7 to estimate, 8-10 round to the nearest tenTH, and 11-14 find each number to the nearest WHOLE number!!!

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7m-8=3(2m+4)+m please help

kirill [66]

Answer:

m=20

Step-by-step explanation:

Solve the equation:

7m - 8 = 3 ( 2 m + 4)

Multiply 3 and (2m+4)

7m - 8 = 6m + 12

Add 8 to each side

7m = 6m + 20

Subtract 6m from both sides

m = 20

If my answer is incorrect, pls correct me!

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-Chetan K

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3 years ago

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3 years ago

What is 5 times 1? I learned this a long time ago but I forgot.

mr_godi [17]

ANSWER:

STEP-BY-STEP EXPLANATION:

The operation is a multiplication, which is expressed as follows:

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1 year ago

An old bone contains 80% of its original carbon-14. Use the half-life model to find the age of the bone. Find an equation equiva

Ira Lisetskai [31]

Answer:

An old bone contains 80% of its original carbon-14 in 1844.6479 years

Step-by-step explanation:

We know that

half life time of C-14 is 5730 years

so, h=5730

now, we can use formula

$P(t)=P_0(\frac{1}{2})^{\frac{t}{h} }$

we can plug back h

and we get

$P(t)=P_0(\frac{1}{2})^{\frac{t}{5730} }$

An old bone contains 80% of its original carbon-14

so,

P(t)=0.80Po

we can plug it and then we solve for t

$0.80P_0=P_0(\frac{1}{2})^{\frac{t}{5730} }$

$0.80=(\frac{1}{2})^{\frac{t}{5730} }$

$\ln \left(0.8\right)=\ln \left(\left(\frac{1}{2}\right)^{\frac{t}{5730}}\right)$

$t=-\frac{5730\ln \left(0.8\right)}{\ln \left(2\right)}$

$t=1844.6479$

So,

An old bone contains 80% of its original carbon-14 in 1844.6479 years

4 0

3 years ago

Read 2 more answers

AAAAAAAAAAAAAAAAAAAAAAA wdjewkhfewhjfuhegkufygqe ANSWER

nikklg [1K]

Answer:

(8+t)^2-6 when t=2

Step-by-step explanation:

1: (8+2)^2-6

2: (10)^2-6

3: 100-6

4: 94

6 0

3 years ago