MATHEMATICS HIGH SCHOOL

Simplify the expression. 7C3A. 5,040

B. 210

C. 1

D. 35

Answers

Answer 1
Answer:

Answer:

35

Step-by-step explanation:

Simplify the expression. 7C3

the formula for nCr is (n!)/(r!(n-r)!)

n=7 and r= 3. Plug in 7 for n and 3 for r in the formula

(7!)/(3!(7-3)!)

(7*6*5*4*3*2*1)/((3*2*1)(4*3*2*1))

Cancel out 4*3*2*1 at the top and bottom

(7*6*5*4*3*2*1)/((3*2*1))

Cancel out 6 at the top and bottom

35
Answer 2
Answer: 7 choose 3 is going to be 35

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(4,? is on the line below. Find the other half of the coordinate

y=2/7x-3

Answers

(x,y)
we are given (4,?)
basically,
if x=4, then what is y equal to ?
subsitute 4 for x
y=2/7(4)-3
y=8/7-3
y=8/7-21/7
y=-13/7=-1 and 6/7

(4,-13/7)

Roxanne has $20 and she wants to buy some shirts. She picks one shirt that costs $10.99 and two shirts that cost $4.99 each. Which statement best describes if an exact total or an approximate total should be calculated? A. Roxanne must add the exact cost of the three shirts so she will know if she has enough money to buy the third shirt. B. Roxanne can round the prices of the shirts to the nearest dollar and then add to estimate if she has enough money.

Answers

your answer is B hope it right

Find the area of each sector.
*Geometry

Answers

The area of the sector in the diagram is 1805π/8 km².

What is area?

Area is the region bounded by a plane shape.

To calculate the area of the sector, we use the formula below

Formula:

  • A = πr²∅/360......................... Equation 1

Where:

  • A = Area of the sector
  • r = Radius of the sector
  • ∅ = Angle of the sector

From the question,

Given:

  • r = 19 km
  • ∅ = 225°

Substitute these values into equation 1

  • A = π×19²×225/360
  • A = 1805π/8 km²

Hence, the right option is B. 1805π/8 km²

Learn more about area here: brainly.com/question/25092270

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HELP QUIC
What is the value of x?



Enter your answer in the box.

Answers

The answer is x = 19

What is the solution of the system? Use a graph.
y = –3x + 2
y = –3x + 4

Answers

there is no solution, they have the same slope
The lines are parallel. The slopes are the same

What is heavier 85 g or 3 oz

Answers

To compare measurements of different units, it is necessary to convert one to the form of the other. Let us try to convert 85g to ounces using the following relation: 1g = 0.035274 oz

85g * (0.035274oz / 1g) = 2.99829 oz.

Therefore, 3 oz is heavier than 85 g.
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