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larisa [96]
3 years ago
12

Solve please....................

Mathematics
2 answers:
PIT_PIT [208]3 years ago
7 0

Answer:

-5/2÷5/7

change to multiplication

-5/2×7/5

reduce the numbers of the greatest common factor of 5

-1/2×7

calculate the product

-1/2×7

the answer is -7/2

if I'm wrong sorry I used a math app to find the answer

xeze [42]3 years ago
6 0
I think -3.50 but not sure
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Find the vertex and axis of symmetry for f(x)=2x^2-1
vfiekz [6]
<h3>Axis of symmetry is 0 and vertex is (0, -1)</h3>

<em><u>Solution:</u></em>

<em><u>Given is:</u></em>

f(x) = 2x^2 - 1

We have to find the vertex and axis of symmetry

<em><u>The general equation is given as:</u></em>

f(x) = ax^2 + bx + c

Comparing with given equation,

a = 2

b = 0

c = -1

<em><u>The axis of symmetry is given as:</u></em>

x = \frac{-b}{2a}

x = \frac{0}{2(2)}\\\\x = 0

Thus axis of symmetry is 0

The x coordinate of the vertex is the same

x coordinate of the vertex = 0

h = 0

The y coordinate of the vertex is:

k = f(h)

k = f(0)

f(0) = 2(0) - 1\\\\f(0) = 0 - 1\\\\f(0) = -1

Thus, y coordinate of the vertex is -1

Therefore, vertex is (0, -1)

3 0
3 years ago
The average height of 8 adults is 1.8 m. What is the sum of their heights? How do I work this out without a calculator?
Katen [24]
Well, the average of a sum of number is found by adding each given number and dividing that number by the amount of given numbers. 
Example: 5+4+3+8=20 
                and 20/4 = 5, the average of the numbers
Multiply 1.8 by 8.0 using this format:

1.8
x8.0
--------


Hope this helped
5 0
3 years ago
Х<br>x<br>(1) Find the value of 7x + 3y <br><br>when<br>= 12 and<br>y = -6​
anyanavicka [17]

Answer:

66

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Four thousand divided by 10 equal hundred divided ten
Alexeev081 [22]

I am quite confused what this problem asks about.

We are given that:

4,000 / 10 is equal to hundred / 10

 

I believe this problem is asking us how much in hundreds is 4,000

 

Therefore the answer is: 40

 

Such that:

<span>4,000 / 10 = 40 hundreds / 10</span>

8 0
3 years ago
Please help meeeeeeeeeeee....<br><br> ty
polet [3.4K]

Answer:

y = 1/26x - 2

Step-by-step explanation:

Subtract x both sides

-26y = 52 + (-x)

Divide by -26 both sides

y = -2 + 1/26x

y = 1/26x - 2

3 0
2 years ago
Read 2 more answers
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