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Igoryamba
3 years ago
11

A marching band has 64 members. The band director

Mathematics
1 answer:
kap26 [50]3 years ago
5 0
Which grade is this and which school?


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On a store counter are exactly two boxes containing only purple marbles and yellow marbles. Box A has 30 purple marbles and 20 y
klemol [59]

Answer: Our required probability would be 0.35.

Step-by-step explanation:

Since we have given that

Number of boxes = 2

Number of purple marbles in Box A = 30

Number of yellow marbles in Box A = 20

Number of purple marbles in Box B = 15

Number of yellow marbles in Box B = 35

So,  If Melanie randomly selects one of the boxes and then randomly selects one marble from that box.

Probability that the marble selected will be purple is given by

\dfrac{1}{2}\times \dfrac{20}{50}+\dfrac{1}{2}\times \dfrac{15}{50}\\\\=\dfrac{1}{2}(\dfrac{20+15}{50})\\\\=\dfrac{1}{2}\times \dfrac{35}{50}\\\\=\dfrac{35}{100}\\\\=0.35

Hence, our required probability would be 0.35.

4 0
3 years ago
Find the zeros of the function <br> F(x)=x^2-5x+5
oee [108]
You would have to replace f(x) with zero and use quadratic formula 

f(x)=x^2-5x+5 
0=x^2-5x+5 

=(-b+-√b^2-4ac)/2a 
=(5+-√25-4(1)(5))/2
=(5+-√5)/2 

x=(5+√5)/2 or x=(5-√5)/2 

Both x values are completely applicable in the equation. 

Hope I helped :) 
6 0
3 years ago
Alvin has a prism-like water tank whose base area is 0.90.90, point, 9 square meters and height is 0.60.60, point, 6 meters. He
Helen [10]

Answer:

2 fishes

Step-by-step explanation:

8 0
3 years ago
BC=<br> Round to the nearest hundred
Vera_Pavlovna [14]

Answer:

2.3 units

Step-by-step explanation:

The unknown side is opposite the given angle 50 degrees, and the length of the hypotenuse is 3 units.

Since sin Ф = opp / hyp, we have here sin 50° = x/3, or x = 3 sin 50°.

Using a calculator, we find that the sine of 50° is 0.776.

Therefore, x = 3(0.766) = 2.298 units, or approximately 2.3 units

3 0
3 years ago
Read 2 more answers
50 POINTS AND BRAINLIEST! What is the area of this figure?
oksian1 [2.3K]

Answer:

42 units²

Step-by-step explanation:

The figure is composed of a rectangle ( middle section) and 2 triangles with the same length base and height

Area of rectangle = 7 × 4 = 28 units²

Area of 2 triangles = 2 × \frac{1}{2} × 7 × 2 = 14 units²

Area of figure = 28 + 14 = 42 units²


5 0
3 years ago
Read 2 more answers
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