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Margaret [11]
2 years ago
10

What is that name of this figure​

Mathematics
1 answer:
Nataliya [291]2 years ago
6 0

Answer:

A square

Step-by-step explanation:

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James has a bag 77 of nickels and dimes. The total value of coins is $6.60. How many dimes does James have?
tatuchka [14]

James has 55 dimes in the bag

Step-by-step explanation:

The given is:

  • James has in a bag 77 of nickels and dimes
  • The total value of coins is $6.60

We need to find how many dimes James has

Assume that the number of nickels is x and the number of

dimes is y in the bag

∵ There are x nickels in the bag

∵ There are y dimes in the bag

∵ There are 77 coins in the bag

∴ x + y = 77 ⇒ (1)

∵ 1 nickel = 5 cents

∴ The value of nickles in the bag = 5x cents

∵ 1 dime = 10 cents

∴ The value of dimes in the bag = 10y cents

∵ The total value of coins is $6.60

∵ 1 dollar = 100 cents

∴ $6.60 = 6.60 × 100 = 660 cents

∴ 5x + 10y = 660 ⇒ (2)

Now we have a system of equations to solve it

Multiply equation (1) by -10 to eliminate y

∵ -10x - 10y = -770 ⇒ (3)

- Add equations (2) and (3)

∴ -5x = -110

- Divide both sides by -5

∴ x = 22

Substitute the value of x in equation (2) to find y

∵ 22 + y = 77

- Subtract 22 from both sides

∴ y = 55

∴ The number of dimes is 55

James has 55 dimes in the bag

Learn more:

You can learn more about the system of equations in brainly.com/question/6075514

#LearnwithBrainly

6 0
3 years ago
What is the missing justification in the proof?
nataly862011 [7]
The missing justification in the proof is
<span>B) Substitution property of equality

The expression for sin</span>² x and cos² x is substituted to the other side of the equation. Since sin x = a/c, then sin² x = a²/c². Similarly, since cos x = b/c, then cos² x = b²/c². Adding to two results to the third statement.
7 0
3 years ago
Read 2 more answers
PLEASE HELP!! <br> Factor completely: x2 + 6x + 8
Harman [31]
8(x + 1) Is the answer
7 0
3 years ago
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Select the point that satisfies y less than or equal to x^2-3x+2
solong [7]

Answer:

Point (4,4) satisfies the required condition.

Step-by-step explanation:

x²-3x+2 = x²-2x-x+2

             = x(x-2)-1(x-2)

            = (x-2)(x-1)

According to the given information

y ≤ (x-2)(x-1)      ...(1)

So lets consider one point having coordinates (4,4).

Substitute (4,4) in equation (1), we get

4≤ (4-2)(4-1)

4 ≤ 6

Hence point (4,4) satisfies the above condition. It's only one example there will be more points which satisfies the required condition.

6 0
3 years ago
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For the line 3x + 4y = 36, what is the slope?
frozen [14]
The slope of this equation is -3/4
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3 years ago
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