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2 years ago

11

Translate this phrase into an algebraic expression. 45 decreased by twice a number Use the variable n to represent the unknown n

umber.

1 answer:

aivan3 [116]2 years ago

7 0

I think that it is 45-2n

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Please help with all 3 questions.

mixas84 [53]

Answer:

1. *2/multiplied by 2, since each number gets higher by *2.

2. *3/multiplied by 3, since each number gets higher by *3

3. ÷2/divided by 2, since each number gets lower by ÷2.

5 0

2 years ago

Calculate the length of AB if A is the point (2,3) and B is the point (-2,0)

d1i1m1o1n [39]

Answer:

Formular for coordinate length:

$length = \sqrt{ {(x_{1} - x _{2} )}^{2} + {(y_{1} - y_{2})}^{2} }$

In considerance of coordinates given of A and B

$x _{1} \: \: is \: \: 2 \\ x_{2} \: \: is \: \: - 2 \\ y_{1} \: \: is \: \: 3 \\ y_{2} \: \: is \: \: 0$

therefore substitute:

$length = \sqrt{ { \{2 - ( - 2) \}}^{2} + {(3 - 0)}^{2} } \\ \\ = \sqrt{ {(2 + 2)}^{2} + {3}^{2} } \\ = \sqrt{ {4}^{2} + {3}^{2} } \\ = \sqrt{16 + 9} \\ = \sqrt{25} \\ \\ { \boxed{ \boxed{length \: \: is \: \: 5 \: units}}}$

5 0

3 years ago

Read 2 more answers

If x° and 54° form a linear pair find x°

elixir [45]

Answer:

x = 126°

Step-by-step explanation:

x + 54 = 180°

x + 54 - 54 = 180 - 54

x = 126°

6 0

2 years ago

Read 2 more answers

Assume you are planning a picnic for lunch, but when you woke up there were rain clouds in the sky. If 50% of rainy days start w

Tasya [4]

Answer:

0.25 = 25% probability that it will rain today and ruin your picnic

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Cloudy skies

Event B: Rain

20% of all days start with clouds in the air

This means that $P(A) = 0.2$

50% of rainy days start with rain clouds in the air

50% of 10%. So

$P(A \cap B) = 0.5*0.1 = 0.05$

What is the probability that it will rain today and ruin your picnic

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.05}{0.2} = 0.25$

0.25 = 25% probability that it will rain today and ruin your picnic

3 0

2 years ago

What is the median of the following numbers?<br> 4, 9, 6, 3, 4, 2

kotegsom [21]

Answer:

4

Step-by-step explanation:

2,3,4,4,6,9 just find the middle number

5 0

3 years ago

Read 2 more answers