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slavikrds [6]
2 years ago
14

Jill needs $40 to buy a toy she really wants. She has $15 atreadyHer birthday is coming up and she is hoping for at least the am

ount needed to buy the toy Which of the following inegues could
be written to solve for the amount she needs to got for her birthday
Click on the correct answer(s)
Mathematics
1 answer:
OleMash [197]2 years ago
7 0

Answer:

40-15=35

Step-by-step explanation:

yes me big brain smarmy me

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Show all your work to receive full credit for this problem. Solve the system of equations using the elimination method. 2a + 3b
Sindrei [870]

Given equations are;<span>
2a + 3b = -1   ..................equation 1
3a + 5b = -2  ....................equation 2</span>

Now multiply equation 1 with (-3)

The equation will be;

-6a -9b = 3 …………………..equation 3

Now multiply equation 2 with (2)

The equation will be;

6a + 10b = -4 ……………..equation 4

Now add equation 3 and equation 4

-6a – 9b = 3

<span>6a  + 10b = -4</span>

<span>------------------------------</span>

0a + b = -1

b = -1

Now put the value of b in equation 1

2a + 3(-1) = -1

2a -3 = -1

2a = -1+3

2a = 2

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3 years ago
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Step-by-step explanation:

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A rectangular metal plate is measured to be 7.6cm long and 3.1cm wide, both correct to one decimal place.
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Answer:

We know that the rectangular plate has measures of:

length = 7.6 ± 0.05 cm

width = 3.1 ± 0.05 cm

(the error is 0.05cm because we know that both measures are correct to one decimal place)

First, the upper bound of the length is equal to the measure of the length plus the error, this is:

L = 7.6 cm + 0.05 cm = 7.65 cm

The upper bound of the area is the area calculated when we use the upper bound of the length and the upper bound of the widht.

Remember that the area for a rectangle of length L and width W, is:

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3 years ago
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