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Ray Of Light [21]
3 years ago
14

The number of students in a school's Spanish club is ten less than four times the number of students in the chess club. Let c re

present the number of students in the chess club. Write an expression for the number of students in the Spanish club.
Mathematics
2 answers:
Lilit [14]3 years ago
6 0

Answer:

10-4(c)

Step-by-step explanation:

We need to write an equation. write it as you read it. S=10-4(C).

mart [117]3 years ago
3 0

Answer:4c-10

Step-by-step explanation:

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4 0
3 years ago
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I am not sure how sigma notation works, can somebody explain how to solve this? It isn't the second choice.
Masja [62]

Answer:

first answer is correct

Step-by-step explanation:

Hello, we want to write 2 + 4 + 6 + ... + 20

for n = 1, 2n = 2*1 =2

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for n = 3, 2n=2*3=6

etc

so

\displaystyle \sum_{n=1}^{10} {2n} = 2*1 + 2*2 +2*3+2*4+...+2*10=2+4+6+8+...+20

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6 0
3 years ago
List all rational roots that are possible according to the rational zero theorem. x^3-5x^2-9x+45=0
Lina20 [59]

-3, 3, 5.

https://www.wolframalpha.com/input/?i=%28x%5E3%29-%285x%5E2%29-9x%2B45%3D0

8 0
3 years ago
15Points!!<br> Factor completely.<br><br><br> 12x² +28x
Zigmanuir [339]

Answer:

4x(3x+7)

Step-by-step explanation:

12x^2+28x\\12xx+28x\\\\4\cdot \:3xx+4\cdot \:7x\\4x\left(3x+7\right)

4 0
3 years ago
PLEASE HELP<br><br> FIND THE LENGTH OF RS.
Gwar [14]

Answer:

A

Step-by-step explanation:

Distance between 2 points

=  \sqrt{(x1 - x2)^{2}  + (y1 - y2)^{2} }

☆ (x₁, y₁) is the first coordinate while (x₂, y₂) I'd the second coordinate.

Length of RS

=  \sqrt{ {[ - 1 -( - 4)] }^{2}  + (9 - 1)^{2} }  \\  =  \sqrt{( - 1 + 4)^{2}  + 8^{2} }  \\  =  \sqrt{ {3}^{2}  + 64 }  \\  =  \sqrt{73}  \\ = 8.54 \: (3 \: s.f.)

Thus, RS is about 8.5 units.

8 0
3 years ago
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