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Mnenie [13.5K]
3 years ago
12

Ella bought some keychain and spent a total of $24. Each keychain cost the same hole dollar amount. She bought between seven and

11 keychains. How many keychains did Ella buy
Mathematics
2 answers:
mina [271]3 years ago
5 0
Ella bought 8 keychains for 3$ each

Here is my math
24/3=8
julia-pushkina [17]3 years ago
4 0
She got 8 of them for $3 a piece <span />
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Evaluate each expression when a = -4 and b = 3<br><br>1.) ab<br>2.) 2a + 3b <br>2.) 2(a - b)​
Svet_ta [14]

1) -12

ab is a times b. We plug in the numbers (-4)*(3) which equals -12.

2) 1

We plug in -4 for a, and 3 for b into the equation.

We get 2(-4) + 3(3)

2*-4 is -8. 3*3 is 9. We add them both, and -8+9 equals 1.

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We plug in -4 for a, and 3 for b into the equation.

2(-4-3)

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3 years ago
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3 years ago
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1 day = 24 hours

1 hour = 60 minutes

1 minute = 60 seconds

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The light flashes 5 times every 10 seconds:

5 flashes / 10 seconds = 1 flash every 2 seconds

86,400 seconds / 2 seconds = 43,200 flashes per day.

4 0
2 years ago
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3 years ago
Complete the problem to represent the situation given by the equation 0.40e + 10 + 15 = 0.20e + 5 + 25. At one store a trophy co
olganol [36]

Answer: The number of letters that must be engraved for the costs to be the same is 125.

Step-by-step explanation:

Since we have given that

0.4e+10+15=0.20e+5+25

We need to find the number of letters.

0.4e+25=0.2e+30\\\\0.4e-0.2e=30-25\\\\0.2e=25\\\\e=\dfrac{25}{0.2}\\\\e=125

Hence, the number of letters that must be engraved for the costs to be the same is 125.

8 0
3 years ago
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