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s344n2d4d5 [400]
3 years ago
7

Mariah's scores on her first five algebra tests are 84%, 90%, 80%, 91%, and 70%. She retakes the last test and improves her scor

e from
70% to 90%.
Complete the sentence:
The measure of center that will be most affected by the new score is the
Select one
The new test score will
Select one
Asse
the standard deviation
CWA
and
CWA
Select one
CW
the interquartile range.
CW
Mathematics
1 answer:
Katena32 [7]3 years ago
4 0

Answer:

Interquartile Range

Step-by-step explanation:

i think

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The difference between seven seven times a number and 8 8 is equal to four four times the sum of the number and 3 3. Find the nu
Harlamova29_29 [7]

Answer:

20/3

7x - 8 = 4(x+ 3)

Step-by-step explanation:

Let the unknown number be x.

Now, the difference between 7 times a number and 8 is equal to four times the sum of the number and 3.

Writing this mathematically:

7x -8 = 4(x + 3)

To solve completely, we open the bracket:

7x - 8 = 4x + 12

7x - 4x = 12 + 8

3x = 20

x = 20/3

The correct equation to solving the problem is 7x - 8 = 4(x + 3)

3 0
3 years ago
How long is the edge of a cube whose volume is twice that of the cube below? Round to the nearest tenth.
Basile [38]

Answer:

\large\boxed{10.1\ cm}

Step-by-step explanation:

The formula of a volume of a cube:

V=a^2

a - length of the edge

We have a = 8cm. Substitute:

V=8^3=512\ cm^3

The volume of second cube:

V'=2V\to V'=2(512\ cm^3)=1024\ cm^3

The length of the edge of the second cube (b):

b^3=1024\to b=\sqrt[3]{1024}\ cm^3

1024=2^{10}=2^{9+1}=2^9\cdot2

Used a^n\cdot a^m=a^{n+m}

b=\sqrt[3]{1024}=\sqrt[3]{2^{10}}=\sqrt[3]{2^9\cdot2}=\sqrt[3]{2^9}\cdot\sqrt[3]{2}

Use (a^n)^m=a^{nm}

=\sqrt[3]{2^{3\cdot3}}\cdot\sqrt[3]{2}=\sqrt[3]{(2^3)^3}\cdot\sqrt[3]{2}

Use \sqrt[3]{a^3}=a

=2^3\sqrt[3]{2}=8\sqrt[3]{2}\ cm

\sqrt[3]{2}\approx1.26\to b\approx8(1.26)\approx10.1\ cm

Other method:

V'=2V\\\\V=a^3,\ V'=b^3\to b^3=2a^3\to b=\sqrt[3]{2a^3}\\\\b=a\sqrt[3]2

a=8\ cm\to b=8\sqrt[3]2\ cm\approx10.1\ cm

3 0
4 years ago
Help me, show work and i need help fast
Mandarinka [93]

4(1-3x)-14>4(2x+3)-9x\\ 4-12x-14>8x+12-9x\\ 11x

8 0
3 years ago
Which problem can be solved using this inequality?
Tpy6a [65]
C three times a number less seven is greater than or equal to twenty.solve for x
8 0
4 years ago
Carly used 15 centimeters of tape to wrap 3 presents. How many presents did Carly wrap if she used 45 centimeters of tape? Assum
Nataly_w [17]
Answer: 9 Presents

Explanation: 15/3 = 45/x.
Cross Multiply: 15x= (45)(3)
Simplify: x= 9
8 0
3 years ago
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