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earnstyle [38]
4 years ago
9

Please help, and explain this also. I want to master this subject. Thank you!

Mathematics
2 answers:
Archy [21]4 years ago
5 0
You would insert -1 into the x and take 3 times -1 which is -3 minus 1 which is -4. Helpful?
Gre4nikov [31]4 years ago
4 0
Y = 3x - 1 when x = -1
When the problem tells you what x is, put it into the problem:
y = 3(-1) -1
Solve the parentheses:
y = -3 -1
Now do the rest of it:
y = -4

I hope this helped you <3

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After being treated with chemotherapy, the radius of the tumor decreased by 23%. What is the corresponding percentage decrease i
Crazy boy [7]

Answer:

The volume of the tumor experimented a decrease of 54.34 percent.

Step-by-step explanation:

Let suppose that tumor has an spherical geometry, whose volume (V) is calculated by:

V = \frac{4\pi}{3}\cdot R^{3}

Where R is the radius of the tumor.

The percentage decrease in the volume of the tumor (\%V) is expressed by:

\%V = \frac{\Delta V}{V_{o}} \times 100\,\%

Where:

\Delta V - Absolute decrease in the volume of the tumor.

V_{o} - Initial volume of the tumor.

The absolute decrease in the volume of the tumor is:

\Delta V = V_{o}-V_{f}

\Delta V = \frac{4\pi}{3}\cdot (R_{f}^{3}-R_{o}^{3})

The percentage decrease is finally simplified:

\%V = \left[1-\left(\frac{R_{f}}{R_{o}}\right)^{3} \right]\times 100\,\%

Given that R_{o} = R and R_{f} = 0.77\cdot R, the percentage decrease in the volume of tumor is:

\%V = \left[1-\left(\frac{0.77\cdot R}{R}\right)^{3} \right]\times 100\,\%

\%V = 54.34\,\%

The volume of the tumor experimented a decrease of 54.34 percent.

5 0
3 years ago
Identify the cross section shown<br><br> circle<br> rectangle<br> triangl<br> trapezoid
const2013 [10]

It is a rectangle

The shaded thing

Must click thanks and mark brainliest

3 0
3 years ago
4 feet equals how many meters
nalin [4]

Hii answer is 1.2192

#$# THANK YOU #$#

8 0
3 years ago
Two-thirds a number plus 4 is 7
faltersainse [42]
2/3n (put that as a fraction) + 4 = 7
6 0
4 years ago
An athlete completes one round of a circular track of diameter 200 m in 40 s what will be the distance covered and displacement
Cloud [144]

Answer:

700π m ~ 2199 m

Step-by-step explanation:

diameter = d = 200 m

2 min 20s = 140 s

1 round / 40 s

140 = 40 * 3 + 20

so the athlete will cover 3 round and half

1 round = d * π

covered = c = 3 * 200 * π + 200/2 * π = 700 * π

7 0
2 years ago
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