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denis23 [38]
3 years ago
8

Evaluate the expression, 52

Mathematics
1 answer:
maw [93]3 years ago
6 0

\huge \boxed{\mathfrak{Question} \downarrow}

  • Evaluate the expression, \boxed{\underline{\bf \: 5^{2}}}

\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}

  • 5² is nothing but ⇨ <u>5 × 5 = 25.</u>
  • Here the 2 displayed above is the exponent or power of 5. So, we have to square 5. This means that we have to multiply 5 by itself & the product formed <u>(25)</u> is the correct answer.
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Complete y^2+15y+56=(y+7)(y+?) ...?
Rufina [12.5K]
The two factors of a quadratic equation can be multiplied to form the original equation. Let the missing term be a:
y² + 15y + 56 = (y + 7)(y + a)
y² + 15y + 56 = y² + (7 + a)y + 7a
We can now compare the coefficient of the like terms, either the one with y or the one without y, and find the value of a.
15 = 7 + a; a = 8
OR
56 = 7a; a = 8

Second factor is (y + 8)
5 0
3 years ago
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Multiply and simplify: sq rt 7x ((sq rt x)-7sq rt. 7)
jarptica [38.1K]
7x(√x - 7√7) Multiply √7x to "√x" and "-7√7" respectively: 
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Extract the squares: x√7 - 7*7√x 

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3 0
3 years ago
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B3BB
skad [1K]

Answer:

C is correct

Step-by-step explanation:

Firstly, we have to solve for x in the solution set of the inequality

We have this as follows;

x + 2 ≥ 6

x ≥ 6-2

x ≥ 4

To graph this, we consider the middle sign which is greater than or equal to

So, the inequality sign has to face the right side

secondly, it has to be shaded on the point 4 due to the fact that it has the ‘equal to’ beneath the single inequality symbol

so, the correct answer here is option C

6 0
2 years ago
Solve for a 6 a=[?] a 10 Be sure to evaluate the square root
sp2606 [1]

Answer:8

Step-by-step explanation:

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2 years ago
The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard devi
son4ous [18]

Answer:

Step-by-step explanation:

Since the length of time taken on the SAT for a group of students is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - u)/s

Where

x = length of time

u = mean time

s = standard deviation

From the information given,

u = 2.5 hours

s = 0.25 hours

We want to find the probability that the sample mean is between two hours and three hours.. It is expressed as

P(2 lesser than or equal to x lesser than or equal to 3)

For x = 2,

z = (2 - 2.5)/0.25 = - 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.02275

For x = 3,

z = (3 - 2.5)/0.25 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.97725

P(2 lesser than or equal to x lesser than or equal to 3)

= 0.97725 - 0.02275 = 0.9545

6 0
3 years ago
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