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Luda [366]
3 years ago
8

Question 2 Which expression is equivalent to 2(x + 7) – 18% +

Mathematics
1 answer:
Shkiper50 [21]3 years ago
7 0

Answer:

c. -16x + 74/5

Step-by-step explanation:

2(x+7) -18x + 4/5 = 2x + 14 -18x + 4/5

2x-18x = -16x and 14 + 4/5 =  74/5

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2. How many real number solutions are there to the equation 0 =-3x2 + x - 4?
goblinko [34]

For this case we have the following quadratic equation:

-3x ^ 2 + x-4 = 0

Where:

a = -3\\b = 1\\c = -4

By definition, the discriminant of a quadratic equation is given by:

d = b ^ 2-4 (a) (c)

We have to:

d> 0: Two different real roots

dTwo different complex roots

d = 0: Two equal real roots

Substituting the values we have:

d = 1 ^ 2-4 (-3) (- 4)\\d = 1-48\\d = -47

So, we have two different complex roots

Answer:

Two different complex roots

7 0
3 years ago
Solve the equation 6 (t-2)=2t 2
Degger [83]
Is plus 2 or minus 2?
3 0
3 years ago
Find the surface area of the prism
Anastasy [175]

slated surface

17 × 20 = 340

2 triangle sides

2 × 8 × 15 ÷ 2 = 120

backside

8 × 20 = 160

bottom

15 × 20 = 300

sum all of it

340 + 120 + 160 + 300 = 920

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4 0
3 years ago
Enter the range of values for x
Pavlova-9 [17]

<em>Greetings from Brasil...</em>

See the attached figure. The smaller the θ angle, the smaller the AB side will be. If the angle θ = 90º, then AB = 25. As θ < 90, then AB < 25

5X - 10 < 25

5X < 25 + 10

X < 35/5

X < 7

The AB side can be neither zero nor negative. So

5X - 10 > 0

5X > 10

X > 10/5

X > 2

<h3>2 < X < 7</h3>

8 0
3 years ago
Does -7 • 8 = 7 • (-8) ?
goldenfox [79]
Yes, because it does not matter which order you multiply the factors in; you will always get the same answer.
3 0
3 years ago
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