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mixer [17]
3 years ago
14

6

Mathematics
1 answer:
saw5 [17]3 years ago
8 0

The above expression is not in its simplest form, and we need to simplify it, that is what asked in the question.

Given equation,

(9 {x}^{2}  - 3x + 7) + ( - 3 {x}^{2}  + 2)

First of all, let's open the parentheses to combine the like terms for simplifying.

9 {x}^{2}  - 3x + 7 - 3 {x}^{2}  + 2

Arranging the like terms, x² with x², x with x and constant terms near to each other.

9 {x}^{2}  - 3 {x}^{2}  - 3x + 7 + 2

Simplying further,

(9 - 3) {x}^{2}  - 3x + 9

6 {x}^{2}  - 3x + 9

So, the correct option is C

<u>━━━━━━━━━━━━━━━━━━━━</u>

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What is the measure of arc BC?<br> 130<br> 65<br> 32.5<br> 180
ale4655 [162]

Answer:

The measure of arc BC is 130° ⇒ 1st answer

Step-by-step explanation:

In a circle:

  • The measure of an arc is equal to the measure of the central angle subtended by it
  • The measure of an arc is equal to double the measure of the inscribed angle subtended by it
  • Central angles subtended by the same arc are equal in measures
  • Inscribed angles subtended by the same arc are equal in measures
  • The measure of central angle is double the measure of the inscribed angle which subtended by its arc

∵ Angle BDC is an inscribed angle

∵ It is subtended by the arc BC

- By using the 2nd fact above

∴ The measure of arc BC = 2 × the measure of ∠BDC

∵ The measure of angle BDC is 65 degree

∴ The measure of arc BC = 2 × 65°

∴ The measure of arc BC = 130°

The measure of arc BC is 130°

7 0
3 years ago
Brainlist for best answer and 100 points
dexar [7]
Well, $920 multiplied by .15 would equal 138 and
since 138 divided by 138 would equal 920. 15% of his income aka $138 would go towards his taxes.
Hope this helped!
have a great day! (:
8 0
3 years ago
Read 2 more answers
How do you graph for the function Y= 1.5x
faltersainse [42]

Answer:

(1,- 1.5)

Step-by-step explanation:

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5 0
3 years ago
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Samples of rejuvenated mitochondria are mutated(defective) in 1% ofcases. Suppose 15 samples are studied, and they can be consid
Bezzdna [24]

Answer:

A)0.86

B)0.99

C)6.047E-13

Step-by-step explanation:

Since p = 0.01 and q= 0.99

Number of event n = 15

Using binomial expansion

A) Probability (No samples are mutated) = 15C0 (p)^0 * (q)^15

= 1*(0.01)^0*(0.99)^15 = 0.86

B)Probability (At most one sample is mutated) = 15C0 * p^0 *q^15 + 15C1 * p^1 * q^14 = 1*(0.01)^0*(0.99)^15 + 15C1 * 0.01 * 0.99^14 = 0.86 + 15*0.01*0.8687 = 0.86 + 0.13 = 0.99

C) Probability (More than half the samples are mutated) = 15C8* 0.01^8 * 0.99^7 + 15C9* 0.01^9 * 0.99^6 +15C10* 0.01^10 *0.99^5 + 15C11 * 0.01^11 * 0.99^4 + 15C12 * 0.01^12 * 0.99^3 + 15C13 * 0.01^13 * 0.99^ 2 + 15C14 * 0.01^14 * 0.99^1 + 15C15 * 0.01^15 * 0.99^0

Probability (More than half the samples are mutated) = 6E-13 + 4.71E-15 + 2.86E-17 + 1.31E-19 + 4.41E-22 + 1.03E-24 + 1.49E-27 + 1E-30 = 6.047E-13

3 0
3 years ago
At the Annual 7th grade breakfast, the teachers buy the students a breakfast of bagels and juice. The table below shows the rela
Serga [27]

Answer:

$187.5

Step-by-step explanation:

if each student costs 1.25 dollars for their meal then you do 150 times 1.25 and get 187.5

6 0
3 years ago
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