(-3.4k-7)+(3k+21) find the sum

Mathematics

1 answer:

Firlakuza [10]3 years ago

4 0

Answer:

-0.4k + 14

Step-by-step explanation:

hope that helped!

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1. Consider the figure below.

Illusion [34]

Answer:

A triangle sums to 180
x-48+2x-164+x= 180
4x-212=180
x= 90

m<A= 16
m<M=90
m<N= 52
Right Triangle
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2 years ago

Please help me thank you so much. Just not sure of my answers

Sedaia [141]

Answer:

An interesting experiment is given. We need to address various questions based on our knowledge of calculus.

Step 2

Part (a)

Time taken for the radius to grow to 2 cm = t1 = r/0.5 = 2/0.5 = 4 hours

Time taken for the radius to become 0 = t2 and the same can be obtained by solving:

r = 2 - √t2 = 0

Hence, t2 = 22 = 4 hours

Hence, the time duration of the entire experiment (from the introduction of the bacteria until its disappearance) = t1 + t2 = 4 + 4 = 8 hours

Step 3

Part (b)

r(t) = 0.5t for 0 ≤ t ≤ 4

and

r(t) = 2 - √(t - 4) for t > 2

Step-by-step explanation:

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3 years ago

When Ricardo was 9 years old, he was 56 inches tall. Ricardo is now 12 years old and he is 62 inches tall. Find the percent of i

Lena [83]

Explanation:
The formula for calculating the percent change in a value between two points in time is:
p
=
N
−
O
O
⋅
100
Where:
p
is the percent change - what we are solving for in this problem.
N
is the New Value - 62 inches in this problem.
O
is the Old Value - 56 inches in this problem.
Substituting and solving for
p
gives:
p
=
62
−
56
56
⋅
100
p
=
6
56
⋅
100
p
=
600
56
p
=
10.7
rounded to the nearest tenth.
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3 years ago

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Your answer is D.160

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3 years ago

Read 2 more answers

What is 2/3 of 3/5 ?

Greeley [361]

Answer:

$\frac{2}{5}$