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max2010maxim [7]
3 years ago
5

Alexis bought x boxes of cereal for $3 each, including tax, and paid with a $20 bill. Which expression represents the total amou

nt of change she should receive?
20 – 3x
(3 – 20)x
3x – 20
(20 – 3)x
Mathematics
2 answers:
Paha777 [63]3 years ago
8 0

Answer:

it is 3x-20

Step-by-step explanation:

when u multiply the three and the x you will get your anser and then u will subtract it out of 20

Katarina [22]3 years ago
3 0

Answer:

A. I got it right on edge 2021

Step-by-step explanation:

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the sum of three times one number, x, and five times a second number,y, is 77. if the sum of the two numbers is 19, find the two
HACTEHA [7]

Answer:

x=9, y=10. (9, 10). The two numbers are 9 and 10.

Step-by-step explanation:

3x+5y=77

x+y=19

------------------

3x+5y=77

-3(x+y)=-3(19)

---------------------

3x+5y=77

-3x-3y=-57

-------------------

2y=20

y=20/2

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5 0
3 years ago
Write two properties of right angled triangle​
leonid [27]

Answer:

The properties of right angle triangle are as follows

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5 0
2 years ago
Find the sum of the first 90 terms of the sequence -4,-1,2,5,8
telo118 [61]

Answer:

1655

Step-by-step explanation:

Note the common difference d between consecutive terms of the sequence

d = - 1 - (- 4) = 2 - (- 1) = 5 - 2 = 8 - 5 = 3

This indicates the sequence is arithmetic with sum to n terms

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ]

Here a₁ = - 4, d = 3 and n = 90, thus

S_{90} = \frac{90}{2} [ (2 × - 4) + (89 × 3) ] = 45(- 8 + 267) = 45 × 259 = 1655

4 0
3 years ago
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