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Svetradugi [14.3K]
3 years ago
14

a collection of 27 coins consist of 20-cent and $2 coins, and has a value of $23.40. find the number of coins of each denominati

on
Mathematics
1 answer:
JulijaS [17]3 years ago
4 0
17 $0.20 coins = $3.40
10 $2.00 coins = $20.00

$20.00 + $3.40 = $23.40
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How do i solve for x ​
sergiy2304 [10]

Expplanation and Answer:

y=mx−7

Swap sides so that all variable terms are on the left hand side.

mx−7=y

Add 7 to both sides.

mx=y+7

Divide both sides by m.

m

mx

​

=

m

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Dividing by m undoes the multiplication by m.

x=

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3 0
3 years ago
Help please thank you!
monitta

Answer:

• multiplied by 4p: (x -h)² +4pk = 0

• zeros for k > 0: none

• zeros for k = 0: one

• zeros for k < 0: two

Step-by-step explanation:

a) Multiplying by 4p removes the 1/(4p) factor from the squared term, but adds a factor of 4p to the k term. (It has no effect on the subsequent questions or answers, so we wonder why we're doing this.) The result is ...

(x -h)² +4pk = 0

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b) The value of k is the vertical location of the vertex of the parabola with respect to the x-axis. The parabola opens upward, so for k > 0, the parabola does not cross the x-axis, and the number of real zeros is zero. (There are two complex zeros.)

__

c) As in part b, the value of k defines the vertex location. When it is zero, the vertex of the parabola is on the x-axis, so there is one real zero (It is considered to have multiplicity 2.)

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d) As in part b, the value of k defines the vertex location. When it is negative, the vertex of the parabola is below the x-axis. Since the parabola opens upward, both branches will cross the x-axis, resulting in two real zeros.

_____

The attached graph shows a parabola with p=1/4 and h=2. The values shown for k are +1, 0, and -1. The coordinates of the real zeros are shown.

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3 years ago
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3 years ago
What is the answer to this? Plz answer! It's due tomorrow!!!!!​
Leya [2.2K]

Answer: the third answer (C)

Step-by-step explanation:

4 0
3 years ago
I need helppppp plzzzzzz
Alla [95]

I think the answer is B.

Rotating a polygon changes it’s location not size.

Hope this is helpful.

5 0
3 years ago
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