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antiseptic1488 [7]
3 years ago
11

You draw a card at random from a deck that contains 3 black cards and 7 red cards.

Mathematics
2 answers:
NNADVOKAT [17]3 years ago
6 0
There are 10 cards in total because 3 + 7 = 10
Because there are 3 black cards, the probability of drawing a black card would be 3/10.
inna [77]3 years ago
3 0

Answer:

The answer is 3/10

Step-by-step explanation:

There are 3 black cards and the total number of cards is 10

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Hans wanted to find the length of the hypotenuse of the triangle. Which statement correctly identifies his error? ​
KonstantinChe [14]

Choice 1. He did not square 40, he just multiplied by 2.

Step-by-step explanation:

Step 1:

According to the Pythagorean theorem, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

The hypotenuse measures c cm while the other sides are 40 cm and 9 cm each.

Step 2:

According to the Pythagorean theorem,

9^{2} +40^{2} = c^{2}.

81 + 1600 = c^{2} .

1681 = c^{2} .

\sqrt{1681} = c.

This is the correct solution to the given problem. Hans did not square 40, he just multiplied by 2. Which is the first option.

5 0
3 years ago
Kiyo bought a pizza for 12.75 and four medium drinks at Paulis pizza. Define a variable and write an expression to represent the
Elina [12.6K]
A = cost of 1 drink $12.75 + 4a $12.75 + $12.00 = $24.75

7 0
3 years ago
Read 2 more answers
30 points!!!
lara31 [8.8K]

Answer:

SAS postulate

Step-by-step explanation:

AD (common)

AC = BD (both are diameters)

Angle COD = Ange AOD (vertically opposite angles)

Angle CAD = Angle BAD (angle on the circumference is half the angle at the centre)

Therefore, ABD and DCA are congruent by SAS postulate

7 0
3 years ago
1. Kerry wants to paint her bedroom. The wall dimensions are 14 feet by 10 feet for
RideAnS [48]

Answer: 336 sq ft

Step-by-step explanation: what is it even asking?

6 0
2 years ago
Kathy is paid $7.50 per hour for babysitting. If she babysits for 5 hours on Friday night, write an equation to represent how mu
nikdorinn [45]

Answer:

$37.5

Step-by-step explanation:

$7.50=in one hr

$? =in five hr

since you can cross each other

<h2>therefore the resalt it will give $37.50 right</h2>
4 0
2 years ago
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