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PtichkaEL [24]
3 years ago
12

Find the vertex of y=x^2+8x-20

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
7 0
<span>The vertex of y=x^2+8x-20 = (-4, -36)</span>
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Write the equations of teh circle in standard form
Nina [5.8K]
(x-h)^2 + (y-k)^2 = r^2
(h,k) is the center
r is the radius
This is given in your lesson plan or textbook.
8 0
3 years ago
Choose all the fractions that are equivalent to 4/8. (Click all that apply.)
Advocard [28]

Answer:

B,C,E

Step-by-step explanation:

Add the first number with itself and it will need to equal the second one

So 5+5 would equal 10, 5/10 is basically this

7 0
3 years ago
Read 2 more answers
Please help!!!!! Answer ASAP
V125BC [204]

Answer:

\large\boxed{P=5\dfrac{3}{10}\ cm=5.3\ cm}

Step-by-step explanation:

If you want find the perimeter, then you must add all lengths of sides of the given polygon.

P=AB+BC+CD+DE+EA\\\\AB=1\dfrac{3}{4}\ cm,\ BC=1\dfrac{1}{10}\ cm,\ AE+DC=1\dfrac{1}{5}\ cm,\ DE=1\dfrac{1}{4}\ cm\\\\P=1\dfrac{3}{4}+1\dfrac{1}{10}+1\dfrac{1}{5}+1\dfrac{1}{4}=\left(1\dfrac{3}{4}+1\dfrac{1}{4}\right)+1\dfrac{1}{10}+1\dfrac{1\cdot2}{5\cdot2}\\\\=2\dfrac{4}{4}+1\dfrac{1}{10}+1\dfrac{2}{10}=3+2\dfrac{3}{10}=5\dfrac{3}{10}

Other method.

Convert the mixed numbers to the decimal:

AB=1\dfrac{3}{4}\ cm=1.75\ cm\\\\BC=1\dfrac{1}{10}\ cm=1.1\ cm\\\\AE+DC=1\dfrac{1}{5}\ cm=1.2\ cm\\\\DE=1\dfrac{1}{4}\ cm=1.25\ cm\\\\P=1.75+1.1+1.2+1.25=5.3\ cm

6 0
3 years ago
Given the Arithmetic series A1+A2+A3+A4 A 1 + A 2 + A 3 + A 4 8 + 11 + 14 + 17 + . . . + 68 What is the value of sum?
wolverine [178]

Because 17 - 14 = 14 - 11 = 3, the ratio of the arithmetic series is 3;

Then, A4 = 8 - 3 = 5; A3 = 5 - 3 = 2; A2 = 2 - 3 = -1; A1 = -1 - 3 = -4.

But 68 = A1 + ( n- 1 ) x r;

68 = -4 + ( n - 1) x 3;

( n - 1 ) x 3 = 72;

n - 1 = 24;

n = 25;

Finally, Sn = ( A1 + An) x n / 2; then, S25 = ( - 4 + 68) x 25/2;

S25 = 64 x 25 / 2;

S25 = 32 x 25;

S25 = 800;

The value of sum is 800.

8 0
3 years ago
Read 2 more answers
Find the perimeter. note that the arc represents a semicircle use 3.14
dlinn [17]
Length of the arc = 1/2 πD = 1/2 x 3.14 x 6 = 9.42 yd

Perimeter = 9.42 + 6 + 6 + 6 = 27.42 yd

---------------------------
Answer: 27.42 yd
---------------------------
5 0
3 years ago
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