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Andrew [12]
3 years ago
12

Please help me.....

Mathematics
1 answer:
Rina8888 [55]3 years ago
7 0

Answer: The last answer is correct

Step-by-step explanation:

BAC and BCA are the same because A=70 degrees B=70 degrees.

if the top looks exactly like the bottom or vise versa, its the same degree.  

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Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula?
ASHA 777 [7]

The <em><u>correct answer</u></em> is:

x=\frac{1\pm \sqrt{(-1)^2-4(1)(-2)}}{2(1)}

Explanation:

The Quadratic Formula is

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

where a, b and c are the coefficients of a quadratic equation written in standard form, or 0=ax²+bx+c.

This means that first, we need to make our equation equal 0.

We have

-2 = -x + x² - 4

To make this equal 0, we must cancel the -2.  We do this by adding 2:

-2+2 = -x + x² - 4 + 2

0 = -x + x² - 2

Now we write this in standard form.  This means the x² term must come first, then the x term, then the constant:

0 = x²-x-2

This makes a = 1, b = -1 and c = -2.  We then plug this into the quadratic formula.

8 0
3 years ago
Read 2 more answers
Plz help me which number do i use for the hight
mr_godi [17]
I believe you use the 12 inches one
8 0
3 years ago
Simplify the expression.<br><br> (−0.75x + 8) + (1.5x + 4.4)<br><br> The simplified expression is
Len [333]

Simplify

-0.75x + 8 + 1.5x + 4.4

Collect like terms

(-0.75x + 1.5x) + (8 + 4.4)

Simplify

<u>0.75x + 12.4 </u>

4 0
3 years ago
a crew of highway workers paved 2/15 mile in 20 minutes.if they continued working at the same rate,what portion of a mile wil th
icang [17]

Answer:

2/5 of a mile

Step-by-step explanation:

The easiest approach is to realise that one hour is 3 times longer than  

20 minutes. The longer the time, the more they will pave.


2/5  of a mile, in 20 minutes, how much in 60 minutes?(#)

They will pave 3 times more.

2/15 x 3/1 = 6/15 of a mile

6/15 = 2/5 of a mile

8 0
3 years ago
A cone has a volume of 24 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of?
ivann1987 [24]

Answer:

8 cubic inches

Step-by-step explanation: I just know

6 0
3 years ago
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