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Arisa [49]
3 years ago
10

Factor this expression completely. Write the factored expression in the space provided.

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
8 0

Answer:

(x + 2) (x + 7)

Step-by-step explanation:

x^2 + 9x + 14

x^2 + 7x + 2x + 14

x( x + 7) + 2(x + 7)

(x + 2) (x + 7)

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What are the values of the coefficients and constant term of 0 = 4 – 7x2 + x in standard form?
sweet [91]

Answer:

a = -7 and b = 1.  The constant term is 4

Step-by-step explanation:

In standard form, this equation is -7x^2 + x + 4 = 0

The coefficients are a = -7 and b = 1.  The constant term is 4.

7 0
3 years ago
Read 2 more answers
During a 20% off sale, the sale price of a bluetooth radio was $33.96. What was the regular price?
SVETLANKA909090 [29]

20% of the regular price was off.

So 80% of the regular price stayed on.

$33.96 was that 80% of the regular price.

(0.8) · (regular price)  =  $33.96

Divide both sides by (0.8).

Regular price =  ($33.96) / (0.8)

<em>Regular price = $42.45</em>

5 0
2 years ago
The Christmas Bird Count (CBC) is an annual tradition in Lexington, Massachusetts. A group of volunteers counts the number of bi
Lerok [7]

Answer:

(5.216) mean = 61.71

(5.217) standard deviation = 8.88

(5.218) P(X>=60) = 0.9238

(5.129) L = 79, U = 69

(5.130) P(X> or = U) = 0.7058

Step-by-step explanation:

The table of the statistic is set up as shown in attachment.

(5.216) mean = summation of all X ÷ no of data.

mean = 432/7 = 61.71 birds

(5.217)Standard deviation = √ sum of the absolute value of difference of X from mean ÷ number of data

S = √ /X - mean/ ÷ 7

= √551.428/7

S = 8.88

(5.218) P (X> or = 60)

= P(Z> or =60 - 61.71/8.8 )

= P(Z>or= - 0.192)

= 1 - P(Z< or = 0.192)

= 1- 0.0762

= 0.9238

(5.219)the 15th percentile=15/100 × 7

15th percentile = 1.05

The value is the number in the first position and that is 79,

L= 79

85th percentile = 85/100 × 7 = 5.95

The value is the number in the 6th position, and that is 69

U = 69

5.130) P(X>or = 60)

= P(Z>or= 69 - 61.71/8.8)

= P(Z> or = 0.8208)

= 1 - P(Z< or = 0.8209)

= 1 - 0.2942

= 0.7058

3 0
3 years ago
A standard card deck has 52 cards consisting of 26 black and 26 red cards. Three cards are dealt from a shuffled​ deck, without
Alekssandra [29.7K]

Answer:

6 / 51

Step-by-step explanation:

It is false.

Reason:

The probability of picking a black card at first is:

26 / 52 = 1/2

There are now 25 black cards and 51 cards in total.

The probability of picking another black card, if there's no replacement is now:

25 / 51

Now, there are 24 black cards and 50 cards left in total.

The probability of picking a black card without replacement now becomes:

24 / 50 = 12 / 25

Hence, the probability of picking three black cards without replacement is:

1/2 * 25/51 * 12 / 25 = 300 / 2550

In simplest form, it is 6 / 51

7 0
2 years ago
A plane travels 800 metres along the runway before taking off at an angle of 10∘
Wittaler [7]

I hope this step by step explanation helps.

8 0
2 years ago
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