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kakasveta [241]
3 years ago
9

In the 1980s, Earth had about five months of very hot weather. In the 1990s, Earth had about

Mathematics
1 answer:
otez555 [7]3 years ago
5 0

Answer:

340%

Step-by-step explanation:

1980s = 5 months of very hot weather

1990s = 22 months of very hot weather

What is the percent increase in hot weather months from the

1980s to the 1990s?

Percent increase = (22 months - 5 months) / 5 months × 100

= 17 / 5 × 100

= 3.4 × 100

= 340%

Percent increase in hot weather months from the 1980s to the 1990s is 340%

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Tanya have several different ways she likes to walk home. One route takes 20 minutes, two of the routes take 30 minutes, and two
svp [43]

Answer:

40%

Step-by-step explanation:

Tanya has a a choice of 5 different routes (1-20 mins, 2-30 mins, 2-40 mins).

How many routes can she take that will take her 30-mins to get home?

The answer is 2.

What's the probability she will take 2 of the 5 routes to get home?

The probability is 2/5 so 40%.

The rounding instruction was there to mislead you in this case :-)

6 0
3 years ago
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fenix001 [56]

y\cdot \:2\frac{1}{2} = 2\frac{1}{2}=\frac{2\cdot 2+1}{2}=\frac{5}{2} =\frac{5y}{2}

a) 2y+\frac{1}{2}=\frac{4y+1}{2}

b) 2y+\frac{1}{2}y=\frac{5y}{2}

<h3><em>So b) is the expression that is equivallent.</em></h3><h3><em></em></h3><h3><em></em></h3><h3><em>Hope I helped you!</em></h3><h3><em>Success!</em></h3>
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3 years ago
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5 0
2 years ago
Find the first 4 terms of the geometric sequence a1=40 and r=0.5
DedPeter [7]
For the answer to the question above, 
a1 = 40 
<span>a2 = 20 </span>
<span>a3 = 10 </span>
<span>.. </span>
<span>aN = (1/2^N-1) a1 { in general aN= (r^N-1) A1 </span>

<span>a5 = (1/2^4) 40 = 40/16 = 2.5
</span>
So the answer to your question is 2.5
I hope my answer helped you. Feel free to ask more questions. Have a nice day!
5 0
3 years ago
Read 2 more answers
The cost of 5 tables exceeds the cost of 8 chairs by Rs.150. Write the linear equation in two variables
Levart [38]

Answer:

The  linear equation in two variables is 5u - 8v  = 150 .

Step-by-step explanation:

As given

The cost of 5 tables exceeds the cost of 8 chairs by Rs150 .

Let us assume that the cost of one table be u .

Let us assume that the cost of one chairs be v .

Than the equation becomes

5u + 150 = 8v

Simplify the above equation

5u - 8v  = 150

Therefore the  linear equation in two variables is 5u - 8v  = 150 .




3 0
3 years ago
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