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Stels [109]
3 years ago
9

Help me please!!!!!!!!

Mathematics
1 answer:
Romashka [77]3 years ago
8 0
A and D is the answers
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Which is the constant term of the algebraic expression -2x2 + 17 -15x + 7xy? -15 -2 7 17
const2013 [10]
17. The constant is the number that's by itself with no variable attached to it. Hope this helped!
4 0
3 years ago
Read 2 more answers
Suppose a and b are the solutions to the quadratic equation 2x^2-3x-6=0. Find the value of (a+2)(b+2).
KonstantinChe [14]

Answer:

(a+2)(b+2) = 4

Step-by-step explanation:

We are given the following quadratic equation:

2x^2-3x-6=0

Let a a and b be the solution of the given quadratic equation.

Solving the equation:

2x^2-3x-6=0\\\text{Using the quadratic formula}\\\\x = \dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\\text{Comparing the equation to }ax^2 + bx + c = 0\\\text{We have}\\a = 2\\b = -3\\c = -6\\x = \dfrac{3\pm \sqrt{9-4(2)(-6)}}{4} = \dfrac{3\pm \sqrt{57}}{4}\\\\a = \dfrac{3+\sqrt{57}}{4}, b = \dfrac{3-\sqrt{57}}{4}

We have to find the value of (a+2)(b+2).

Putting the values:

(a+2)(b+2)\\\\=\bigg(\dfrac{3+\sqrt{57}}{4}+2\bigg)\bigg(\dfrac{3-\sqrt{57}}{4}+2\bigg)\\\\=\bigg(\dfrac{11+\sqrt{57}}{4}\bigg)\bigg(\dfrac{11-\sqrt{57}}{4}\bigg)\\\\=\dfrac{121-57}{156} = \dfrac{64}{16} = 4

3 0
3 years ago
Can someone help me?
scoundrel [369]

Answer: its 180

Step-by-step explanation: length times width is the area. 15 times 12 is 180

5 0
3 years ago
Read 2 more answers
A store pays $24 for a jewelry box and marks the price up by 20%. What is the amount of
Ratling [72]

Answer:

$4.8

Step-by-step explanation:

$24×20/100=$4.8

7 0
3 years ago
Can someone please help me?
Sever21 [200]

Answer:

B.

Step-by-step explanation:

The problem is saying 2/5 squared by -2 times -3 multiplied by itself 4 times.

2/5 multiplied by itself -2 times looks like this: -2/5 times -2/5.

-3 multiplied by itself 4 times looks like this: -3 times -3 times -3 times -3.

Put the two together and it looks like B.

4 0
3 years ago
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