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erma4kov [3.2K]
3 years ago
9

PLS HELP !!!!! :( this is really hard please I need help

Mathematics
1 answer:
Keith_Richards [23]3 years ago
4 0

Answer: At least 13

Step-by-step explanation:

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If x=5^a, find the value of 5x. How?
Yakvenalex [24]

Answer:

5x = 5^{(a+1)}

Step-by-step explanation:

Here is a problem with the concept of properties of the exponent.

We are given x = 5^{a} and we have to find the value of 5x.

Now, 5x = 5 \times 5^{a} {Since we are given that x = 5^{a}}

⇒ 5x = 5^{1} \times 5^{a} {Since we can write x = x^{1}}

⇒ 5x = 5^{(a+1)} {Since we know the formula of exponent as x^{m} \times x^{n} = x^{(m + n)}}

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3 years ago
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IRINA_888 [86]
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6 0
3 years ago
What is the correct answer and why show your work
Anna11 [10]

Answer:

A7.45x = y

Step-by-step explanation:


We can use a ratio to solve this problem.  Take the total cost of the lunches and divide by the number of lunches.

y = total cost of lunches and

x = number of lunches

74.50             y

-------------- = ------------

10                     x


Using cross products

74.5 x = 10 y

Divide each side by 10

74.5/10 x= 10y/10

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6 0
3 years ago
Read 2 more answers
Solve by elimination <br><br>-8x+8y=19<br><br>-4x+4y=8
Harrizon [31]

Answer: the first one :x=y+ −19 /8

the second one:  x=y−2

Step-by-step explanation:

6 0
3 years ago
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