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KatRina [158]
3 years ago
15

(2+(-3)(5))(3+2(-6)) using order of operations

Mathematics
1 answer:
joja [24]3 years ago
4 0

Answer:

117

Step-by-step explanation:

First, parenthesis comes first, so let's look at the first group first. After parenthesis, you should solve exponents, but there are none in this example so we'll skip that part. The next step is multiplication. If you look in (2+(-3)(5)), there is multiplication; (-3)(5). When you multiply these 2 values out, you'll get -15. But don't forget about the +2 at the beginning of the parenthesis!! When you add 2 to the the -15 we just got, you'll get -13. Moving on to the 2nd parenthesis, there is also a multiplication application of (2)(-6). When you multiply this, you get -12. But there's still the +3. If you add -12 and 3, you get -9. Now, you have to multiply your answers from both groups of parentheses together. The 2 values are -13 and -9. When you multiply these 2 together, you get 117 because the two negatives cancel each other out.

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Which equation could be solved using this application of the quadratic formula?
Alex_Xolod [135]

Answer:

C. x^2 + 2x - 1 = 3

Step-by-step explanation:

The standard form of a quadratic equation is

ax^2 + bx + c = 0

We need to use the quadratic formula and the given expression to find the values of a, b, and c.

The quadratic formula is

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Where the formula has -b, the problem has -2, so b = 2.

Now we have

ax^2 + 2x + c = 0

In the denominator, where the formula has 2a, the problem has 2(1), so a = 1.

Now we have

x^2 + 2x + c = 0

Inside the root, the quadratic formula has -4ac. the problem shows -4(1)(-4). Since we already know that a = 1, then c = -4.

Now we have

x^2 + 2x - 4 = 0

Let's look at choice A.

x^2 + 1 = 2x - 3

Subtract 2x from both sides. Add 3 to both sides.

x^2 - 2x + 4 = 0   <em>This is not it!</em>

Let's look at choice B.

x^2 - 2x - 1 = 3

Subtract 3 from both sides.

x^2 - 2x - 4 = 0     <em>This is not it!</em>

Let's look at choice C.

x^2 + 2x - 1 = 3

Subtract 3 from both sides.

x^2 + 2x - 4 = 0     <em>This is it!</em>

Answer: C. x^2 + 2x - 1 = 3

8 0
3 years ago
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inysia [295]

Answer:

1 out of 26

Step-by-step explanation:

Because there are 26 letters in the alphabet !

4 0
3 years ago
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Coordinate of A are (0,0)
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We can find the distance from A to A' using the distance formula:

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Thus, rounded to nearest hundredth, AA' is equal to 5.39
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3 years ago
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ArbitrLikvidat [17]

Answer:

1

Step-by-step explanation:

The slope of this line is -1 or -1/1, and to find the perpendicular slope you find the opposite of the reciprocal, which in this case would be 1/1 which simplifies to 1.

7 0
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6 0
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