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Ket [755]
3 years ago
7

2a² - a - 13 =2 I want to see the steps how its done​

Mathematics
1 answer:
sammy [17]3 years ago
8 0

Answer:

Step-by-step explanation:

2a^-a-13=2

Subtract 2 from both sides :

2a^2-a-13=2=2-2

2a^2-a-15=0

Factor left side of the equation :

(2a+5) (a-3)=0

Set factors equal to 0 :

2a+5=0 or  a-3=0

a=-5/2   or a=3

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Mr. Williams's class has 12 girls and 17 boys. He plans to randomly select one student to take notes each day for the class
8_murik_8 [283]

Answer:

12/29 chance or 0.413793103

Step-by-step explanation:

12+17=29

17/29 boys

12/29 girls

5 0
3 years ago
Use the graph of y=sin theta to find the value of 2theta for theta = pi/4 radians
Mariana [72]
We have that
y=sin x

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<span>theta = pi/4 radians
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using a graph tool
see the attached figure

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</span>
the solution is
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3 years ago
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3 years ago
Read 2 more answers
What is the image of (-1, 1) after a dilation of 2?<br> (1,3)<br> (-2, 2)<br> (2, 2)
Amanda [17]
The answer is b. (-2,2)

Since it is a dilation of 2, multiply each number by 2.

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5 0
3 years ago
Which ordered pairs are solutions to the inequality y − 4x ≤ −6?
Troyanec [42]
Choice a:
The order pair given is (<span>1, 3)
y-4x = 3-4(1) = -1
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Therefore, this choice is wrong

Choice b:
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y-4x = -14-4(-2) = -6
-6 is equal -6
Therefore, this choice is correct

Choice c:
The order pair given is (-1, -9)
y-4x = -9-4(-1) = -5
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Therefore, this choice is wrong

Choice d:
The order pair given is (3, 5)
y-4x = 5-4(3) = -7
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Therefore, this choice is correct

Choice e:
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Therefore, this choice is wrong
7 0
3 years ago
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