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CaHeK987 [17]
3 years ago
6

1.2 + 0.8-4-3(0.7 -0.81) evaluate the expression

Mathematics
2 answers:
AleksandrR [38]3 years ago
7 0

Answer:

1.73

Step-by-step explanation:

The other guy is wrong

yaroslaw [1]3 years ago
5 0
Answer: -1.67

1.2+.8-4-3(-.11)
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for a graph of a quadratic i have x intercepts that are x=12 and x =35 do i have enough information to find the y-coordinate of
goldenfox [79]

Answer:

No... provided no other information or no graph is provided.

Step-by-step explanation:

You can find the x-coordinate of the vertex which can be calculated using the two given x-intercepts. Using the symmetry of the parabola, it would just mean the vertex should lay midway between the x's. So the x-coordinate of the vertex is (12+35)/2=47/2.

However, we do not have enough information about the relationship between x and y to find the y-coordinate of the vertex.

All we are given is y=a(x-12)(x-35) (where a is real number) since we know the relationship is quadratic, and the zeros are 12 & 35.

So we could have many possible y-coordinates for our vertex since we don't know the value of a in our equation and we can plug in our x-coordinate for our vertex to find them all.

y=a(47/2-12)(47/2-35)

I'm just going to put everything to right of a in calculator:

y=-529/4 ×a

So that's all the possible y-coordinates for the vertex.

7 0
3 years ago
The radius of a circle is 19 kilometers. What is the circle's area?
Firdavs [7]
<h2> <em>Answer</em></h2>

<em>361</em><em>π</em><em>km²</em>

<h2> <em>Explanation</em></h2>

• the formula to find the area of a circle is A=πr²

<h3> => <em>A=π(19km)²</em></h3><h3><em>A=π(19km)² => A=361πkm</em>²</h3><h2><em>I</em><em> hope</em><em> it</em><em> helps</em><em>!</em><em>!</em></h2>

4 0
3 years ago
The amount of bacteria in a petri dish increases at a rate proportional to the amount present. At time t=0, the amount of bacter
Lilit [14]

Answer:

Step-by-step explanation:

Formula to be used is N=N0e^(kt)

N0 - amount of bacteria at time 0, which is 10g

t=2, 30g

30 = 10*e^(k*2)

3 = e^(2k)

2k = ln3

k = 0.5ln3

At t=6:

N = 10*e^(0.5ln3*6)

N = 10e^(3ln3)

N = 10e^ln27

N = 10*27 =270

So the amount of bacteria at t=6 is 270

6 0
4 years ago
Segment AB = 4x - 10
White raven [17]
(4x - 10) + (12x + 6) = 68
16x - 4 = 68
16 x = 72
x = 4.5

So, 12 (4.5) + 6 = 60
5 0
4 years ago
Read 2 more answers
I NEED HELP PLEASE WILL MARK BRAINLIEST!!!!!!!!!
Sonja [21]

Answer:

i thank is is the number 2

4 0
3 years ago
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