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Nostrana [21]
3 years ago
8

-3 over 4 +1 1 over 4 add using number line

Mathematics
1 answer:
Yuki888 [10]3 years ago
3 0

-19 im guessing hope the answer works

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7/10 of 120 and show work pls
slavikrds [6]
When it says 7/10, it actually means 70%, so you have to find 70% of 120.
<span>
70 % of 120 
= 70% x 120 
= (70/100) x 120 
= (8400/100) 
= 84

Answer: 84</span>
8 0
3 years ago
I need help with a math question ASAP!! please Below is a screenshot of the problem
Nady [450]

Answer:

Pretty sure it's B, the second one from the top

3 0
3 years ago
Read 2 more answers
Element X is a radioactive isotope such that every 51 years, its mass decreases by half. Given that the initial mass of a sample
pychu [463]

Answer: It will take 6 years for 7500 grams of X to reach 6900 grams.

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for completion of half life:  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

51=\frac{0.69}{k}

k=\frac{0.69}{51}=0.0135years^{-1}

b) for  7500 g to reach to 6900 g

t=\frac{2.303}{0.0135}\log\frac{7500}{6900}

t=6years

It will take 6 years for 7500 grams of X to reach 6900 grams.

5 0
3 years ago
Solve for c.<br><br> 2(c +1) = 10
coldgirl [10]

Answer:

c=4

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

2(c+1)=10

(2)(c)+(2)(1)=10(Distribute)

2c+2=10

Step 2: Subtract 2 from both sides.

2c+2−2=10−2

2c=8

Step 3: Divide both sides by 2.

2c

2 = 8

2

c=4

8 0
3 years ago
Read 2 more answers
Suppose Nancy has 15 sorts of colors black, red, and of wschure black and were
Mandarinka [93]

Answer:

Hi there here is the answer!

Step-by-step explanation:

Out of the 3 main chioces there is a total of 15!

so, it would be a probability of <em>5/15. or 1/3 / 1:3</em>

4 0
3 years ago
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