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Maurinko [17]
3 years ago
7

Tina and Zion earn $38 per week for delivering newspapers. Tina worked for x weeks and earned an additional total bonus of $15.

Zion worked for y weeks. Which expression shows the total money, in dollars, that Tina and Zion earned for delivering newspapers? (1 point) Question 3 options: 1) 53x + 38y 2) 38x + 15 + 38y 3) 38x − 15 + 38y 4) 38x + 53y
Mathematics
1 answer:
sergejj [24]3 years ago
3 0

Answer:

it would be (38x+15)+38y

Step-by-step explanation:

x=number of weeks

38 times x=38x

53x=53 weeks

bonus of 15=38x+15

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12 and 13? I need help please!
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I think 12 might be the second one, I'm not sure though!
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Solve the system by substitution. Check your solution. <br> a-1.2b=-3 <br> 0.2b+0.6a=12
velikii [3]
A - 1.2b = - 3         ⇒ eq. 1
0.2b + 0.6a = 12   ⇒ eq. 2

a - 1.2b = - 3  
a = 1.2b - 3           ⇒ eq. 3

Substitute eq. 3 to eq. 2
0.2b + 0.6(1.2b - 3) = 12
0.2b + .72b - 1.8 = 12
Combine like terms
0.92b = 12 + 1.8
0.92b = 13.8   ⇒ divide both sides by 0.92 to get the value of b
<span>b = 15

</span>Substitute the value of b to eq. 3
a = 1.2b - 3
a = 1.2(15) - 3 
<span>a = 15

</span>to check: substitute the values of a and b to:
eq. 1
a - 1.2b = - 3 
15 - (1.2)(15) = -3 
15 - 18 = - 3 
- 3 = -3    ⇒ correct!

eq. 2 
0.2b + 0.6a = 12 
(0.2)(15) + (0.6)(15) = 12
3 + 9 = 12
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7 0
4 years ago
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A slide and its ladder form a right triangle with the ground, with the
zhuklara [117]

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15.6 ft

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Let's call

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  • b: distance from the bottom of the ladder to the bottom of the slide = 12 ft
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From Pythagorean theorem:

c² = a² + b²

c = √(10² + 12²)

c = 15.6 ft

8 0
3 years ago
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1 second = 5.8x10^6 mg
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1000 mg = 1 g
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Therefore, 5.8x10^6 mg/s = 3.48x10^5 g/min
6 0
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