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4 years ago

7

about 30% of the population is left-handed. If two people are random selected what is the probability that both are left handed?

What is the probability that at least one is right handed?

1 answer:

Svetradugi [14.3K]4 years ago

4 0

Answer:

0.91

Step-by-step explanation:

1 - P(both left handed)

1 - 0.3² = 0.91

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Two triangles are similar if there is a correspondence between their angles and their sides so that all corresponding angles are

Setler79 [48]

Answer:

see the explanation

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional (this ratio is called the scale factor) and its corresponding angles are congruent

therefore

Two triangles are similar if there is a correspondence between their angles and their sides so that all corresponding angles are <u><em>congruent </em></u> and all corresponding sides are <u><em>proportional</em></u>

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4 years ago

What is an expression which represents the sum of (3x-7y) and (10x+3y) in simplest terms?

Kobotan [32]

Answer:

3 x − 4 y + 10

Step-by-step explanation:

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3 years ago

If a quadratic polynomial has an absolute minimum at (-3,-5), what is the range of the polynomial?

irga5000 [103]

Answer:

range: (-5, ∞)

domain: (-∞, ∞)

Step-by-step explanation:

given vertex, absolute minimum: (-3, -5)

Range look at y-value

(minimum, maximum) the -5 will be on the left of the comma b/c its the min

If this was a max, you would put the y-value on the right side of the comma

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3 years ago

Mr. Lance designed a class banner shaped like the polygon shown. What is the name of the polygon

dedylja [7]

The Polygon has 5 sides hence it is called a Pentagon.

Note : if it is 4 sided, it could be a square, or rectangle or parallelogram or rhombus.

5 sided is a Pentagon

6 sided is an Hexagon

7 sided is a Heptagon

8 sided is an Octagon

9 sided is a Nonagon

10 sided is a Decagon

The one in the question is 5 sided, so it is a Pentagon.

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3 years ago

Jorden leaves home for school on his bike everyday at 6:00 AM, traveling at 32 km/h. one day he forgot his homework, which his m

densk [106]

Answer:

She caught up with Jordan at 6:39 AM

Step-by-step explanation:

We solve this question making linear functions for the distances that Jorden and his mom have driven, and then we equalize them to find the moment they caught up.

Jorden leaves home for school on his bike everyday at 6:00 AM, traveling at 32 km/h.

Her mom will have left 15 minutes after he left, when he will already have traveled $\frac{15*32}{60} = \frac{32}{4} = 8\text{km}$

So, his position after t minutes can be modeled by the following function:

$J(t) = 8 + 32t$

His mom

His mom goes after him starting from home, so the initial position is 0, with a velocity of 52 km/h. So her position can be modeled by the following function:

$M(t) = 52t$

At what time did she catch up with Jorden,

She catches up t minutes after 6:15 AM.

t is found when

$M(t) = J(t)$

So

$8 + 32t = 52t$

$20t = 8$

$t = \frac{8}{20}$

$t = 0.4$

0.4 of an hour is 0.4*60 = 24 minutes.

So she catched up with Jordan after 6:15 AM + 24 minutes = 6:39 AM

4 0

3 years ago