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LuckyWell [14K]
2 years ago
11

Evaluate 5 + 2(x + 7)2 for x = -4. O A. 23 O B. 13 O C. 18 O D. 63

Mathematics
2 answers:
dusya [7]2 years ago
7 0

Hey there! :)

Answer:

A. 23.

Step-by-step explanation:

Given:

5 + 2(x + 7)² for x = -4

Substitute in -4 for x in the equation:

5 + 2((-4) + 7)²

5 + 2(3)²

5 + 2(9)

5 + 18 = 23.

Therefore, the correct answer is A. 23.

sertanlavr [38]2 years ago
5 0

Answer:

23

Step-by-step explanation:

5 + 2(x + 7)^2

Let x =-4

5 + 2 ( -4+7)^2

Parentheses first

5 +2 (3)^2

5+ 2*9

Multiply

5+18

add

23

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A trapezoid has a height of 6 inches, an area of 120 square inches, and one base measuring 13 inches. Find the length of the oth
kirill [66]

Answer:

27

Step-by-step explanation:

Givens

b1 = 13

b2 = ?

h = 6

Area = 120

Formula

Area = (b1 + b2) * h/2         Multiply by 2

2Area = (b1 + b2)*h           Divide by h

2Area/h = b1 + b2              Subtract b1 from both sides

2Area/h - b1 = b2

Solution

2*120 / 6 - 13 = b2

40 - 13 = b2

b2 = 27

It is always handy to solve an equation in the form that finds the unknown on one side. It makes the solution much easier.

6 0
3 years ago
Which of these steps will eliminate a variable in this system? help pls
Nataly [62]
The answer is B. Dbsjskkdjcjdks
4 0
2 years ago
Read 2 more answers
How many triangles can be constructed with sides measuring 1 m, 2 m, and 2 m?
Margaret [11]
Answer: B
Explanation: ONE triangle can be formed.
According to the triangle inequality theorem, the sum of any two sides must be greater or equal than the length of the third side.
Here, the sides are 1 m, 2 m, and 2m. 1m + 2m = 3m > 2m (theorem followed) 2m + 2m = 4m > 1m (theorem followed)
Since, the triangle inequality theorem is followed, Hence, ONE triangle can be formed.
8 0
3 years ago
Read 2 more answers
How do I solve this??
WITCHER [35]

Answer:

Step-by-step explanation:

Formula

Sn = (a + a + (n - 1)*d) * n / 2

Givens

Sn = 60

a =  3

Solution

You want integer values for d and n

60 = (2*a + (n - 1)*d) * n/2           Multiply both sides by 2

120 = (2*3 + (n - 1)*d ) * n    

120 = (6 + n*d - d) * n

120 = 6n + n^2*d - d*n

This gives some really wild results. I will list all of them here. and then discuss them.

These are the ones that give results without any question and are correct.

n         d         tn

2         54         3  57

3          17         3    20   37

4           8         3    11   19   27

Here are some that are the gift of the equation

20         0           3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3

Now the equation says the following 3 are correct, but are they? Can you have a negative n? The equation says yes, but I doubt your instructor will.

-5         5          

-1         63

-2        22

You can bring these up if you are in a classroom. I wouldn't if you have to submit this to a computer which has absolutely no ability whatever to think about exceptions. Even the 20 0 is one I wouldn't use.

7 0
3 years ago
Need help please hurry !!!!​
timama [110]

Answer:

answer: c

Hope that helps!

4 0
2 years ago
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