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saul85 [17]
3 years ago
9

Jonathan goes to the store and purchases 3 pencils for $0.28 each, and X number of erasers for $0.38 each. Write an expression t

hat shows how much Jonathan spent.
Mathematics
1 answer:
Digiron [165]3 years ago
5 0
.28(3) + .38x = .84 + .38x
where x represents the number of erasers
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The length of each side of a regular pentagon is increased by 8 inches, so the perimeter is now 65 inches. What is the original
evablogger [386]

<em>Here</em> as the <em>Pentagon</em> is <em>regular</em> so it's <em>all sides</em> will be of <em>equal length</em> . And if we assume It's each side be<em> </em><em><u>s</u></em> , then it's perimeter is going to be <em>(s+s+s+s+s) = </em><em><u>5s</u></em>.And as here , each <em>side</em> is increased by <em>8 inches</em> and then it's perimeter is <em>65 inches</em> , so we got that it's side after increament is<em> (s+8) inches</em> and original length is <em>s inches </em>. And if it's each side is <em>(s+8) inches</em> , so it's perimeter will be <em>5(s+8)</em> and as it's equal to <em>65 inches</em> . So , <em><u>5(s+8) = 65</u></em>

{:\implies \quad \sf 5(s+8)=65}

{:\implies \quad \sf 5s+5\times 8=65}

{:\implies \quad \sf 5s+40=65}

{:\implies \quad \sf 5s=65-40}

{:\implies \quad \sf 5s=25}

{:\implies \quad \sf s=\dfrac{25}{5}=5}

{:\implies \quad \bf \therefore \quad \underline{\underline{s=5\:\: Inches}}}

As we assumed the original side to be <em><u>s</u></em> .

<em>Hence, the original side's length 5 inches </em>

8 0
2 years ago
A rental car costs $65 for one day plus an additional $0.35 per mile.
vredina [299]

Answer:

$105.25

Step-by-step explanation:

$0.35 x 115 = $40.25

$40.25 + $65 = $105.25

Have a great day!

5 0
3 years ago
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Tegan takes 23 minutes to walk to work. After getting a new
11Alexandr11 [23.1K]

Answer:

18.66 minutes or 18 minutes 39.6 seconds

Step-by-step explanation:

23 x .19 = 4.37

23 - 4.37 = 18.66 minutes

8 0
3 years ago
How do you solve (3.2×(6.1×6.3)) -2.8 with PEMDAS
galben [10]
Question: How do you solve [3.2 x (6.1 x 6.3)] - 2.8 with PEMDAS?
PEMDAS is the order of operations with which you solve an equation. So first parentheses, then exponents, then multiplication, then division, then addition, and last subtraction.

Answer: First, you solve the parentheses in the parentheses:
>6.1 x  6.3 = 38.43
Now ur equation is: (3.2 x 38.43) - 2.8
Now you solve what's inside this parentheses:
>3.2 x 38.43 = 122.976
Now you do the subtraction, because you have already solved all of what's in the parentheses:
>122.976 - 2.8 = 120. 176
And so, your answer is 120.176
This is what your equation should look like when you're solving:
>[3.2 x (6.1 x 6.3)] - 2.8 = y
>[3.2 x (38.43)] - 2.8 = y
>(3.2 x 38.43) - 2.8 = y
>122.976 - 2.8 = y
>122.976 - 2.8 = 120. 176

4 0
3 years ago
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What is the area of the triangle? ​
kirill [66]

Answer:

The area of a right triangle of base b and height h is 1/2 × base × height (or) 1/2 × b × h.

Step-by-step explanation:

The area of a right triangle of base b and height h is 1/2 × base × height (or) 1/2 × b × h.

6 0
3 years ago
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