What's 80% of 5 dollars

Answers

Answer 1

Answer: you can multiply 5 by 0.80 to get 4.

you can prove this by showing that (4/5)x100%=80% (4/5=0.80)

Answer 2

Answer: you can multiply 5 by 0.80 to get 4
i hope i help it

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Which point is on the circle described by (x - 2)2 + (y + 3)2 = 4?A. (2, -5)
B. (2, 0)
C. (0, 0)
D. (1, -4)

Answers

Answer: The correct option is (A) (2, -5).

Step-by-step explanation: We are to select the point that is on the circle described by the following equation :

$(x-2)^2+(y+3)^2=4~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

Option (A) :

(x, y) = (2, -5).

We have

$L.H.S.\n\n=(x-2)^2+(y+3)^2\n\n=(2-2)^2+(-5+3)^2\n\n=0+4\n\n=4\n\n=R.H.S.$

So, the point (2, -5) lies on the circle (i). And so, option (A) is correct.

Option (B) :

(x, y) = (2, 0).

We have

$L.H.S.\n\n=(x-2)^2+(y+3)^2\n\n=(2-2)^2+(0+3)^2\n\n=0+9>4=R.H.S.$

So, the point (2, 0) lies outside the circle (i). And so, option (B) is incorrect.

Option (C) :

(x, y) = (0, 0).

We have

$L.H.S.\n\n=(x-2)^2+(y+3)^2\n\n=(0-2)^2+(0+3)^2\n\n=4+9=13>4=R.H.S.$

So, the point (0, 0) lies outside the circle (i). And so, option (C) is incorrect.

Option (D) :

(x, y) = (1, -4).

We have

$L.H.S.\n\n=(x-2)^2+(y+3)^2\n\n=(1-2)^2+(-4+3)^2\n\n=1+1<4=R.H.S.$

So, the point (2, -5) lies inside the circle (i). And so, option (D) is incorrect.

Thus, (A) is the correct option.

the answer is B last time i got this question on a test and i got it right nit sure if its the same test but it is the same question you can try ! sorry for not remembering quite well

If 0.46 meter is cut from a 12 meter steel rod, how long is the steel rod after the cut?

Answers

The answer is 11.54 because 12.00 -00.46 is 11.54

The answer should be 11.54 because if you decrease 0.46 from 12 thats what you get

What can be said about the discriminant of the graph below?

Answers

Answer:

C. The discriminant is negative, so there are no solutions.

Step-by-step explanation:

We see that the given figure is a graph of a parabola.

The equation of the given parabola is $y=(x-3)^(2)+1$ .

Simplifying the equation in quadratic form, we get,

The equation is $y=(x-3)^(2)+1$ i.e. $y=x^(2)+9-6x+1$ i.e. $y=x^(2)-6x+10$ .

We know that the discriminant of a quadratic equation $ax^(2)+bx+c=0$ is given by $D=b^(2)-4ac$

So, from the equation $x^(2)-6x+10=0$ , we have,

a = 1, b = -6 and c = 10

Thus, the discriminant is $D=(-6)^(2)-4* 1* 10$

i.e. $D=36-40$

i.e. $D=-4$

So, the discriminant is -4 i.e. negative.

Hence, as the discriminant is negative, there are no solutions.

What is 80% of 38 ? plzzzz help

Answers

Answer:

30.4

Step-by-step explanation:

80x38/100

80/100 *x/38
X=(38*80)/100
X=30.4

Solve for the indicated variable.

s = p + g/h for g.

Answers

Answer:

g = h(s-p)

Step-by-step explanation:

find the variable of interest — It is in the numerator of one of two terms on the right side of the equation
subtract every term on that side not containing the variable — subtract p to get s-p = g/h
multiply by the inverse of the coefficient of the variable of interest — the coefficient is 1/h, so we multiply by h to get ... h(s-p) = g
rearrange to the desired form. Here, it is probably OK to leave the parentheses and to simply put g on the left

g = h(s -p)

Answer:

(s-p)*h =g

Step-by-step explanation:

s = p + g/h

Subtract p from each side

s-p = p=p + g/h

s-p = g/h

Multiply by h

(s-p) *h =g/h *h

(s-p)*h =g

Which is the length of PQ if the length of AB is 8?