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Anastasy [175]
3 years ago
5

What is the answer to -4 + 7 = ___

Mathematics
1 answer:
12345 [234]3 years ago
3 0

Answer: 3

Step-by-step explanation:

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Insert the “equal” sign or the “not equal” sign (= or #) to make each statement true.
dexar [7]

a.18/36#12

b.13/15#1140

8 0
3 years ago
a band that will be the opening act for a concert charges a $700.00 flat fee as well as 16% of all ticket profits from ticket sa
Fofino [41]
The band earned $1,200.

1. Subtract the flat fee 1,200-700 =500
2. 500 is what just the band made. Divide that by .16 (16%) to get the total ticket amount... 500 divided by .16 = 3,125

The total ticket amount was $3,125.
5 0
3 years ago
Water fills a tank at a rate of 150 litres during the first hour, 350 litres during the second, 550 litres during the third and
Alborosie
Putting this as an arithmetic sequence gives:

u_n = 150+200(n-1)

The sum of the series = 16 x 7 x 7 = 784 m^3 = 784 000 L

The sum of an arithmetic series can be written as:

S_n=n/2 [2a+(n-1)d] = 784 000
\\n/2[2(150)+(n-1)200] = 784 000
\\n[300+200(n-1)=1 568 000
\\300n+200n^2-200n = 1 568 000
\\200n^2+100n- 1 568 000 = 0
\\2n^2 +n- 15680 = 0

\\n= 88.2...,-88.7

n has to be positive, so we get

n = <u>88.2 hours (3 s.f.)</u>
3 0
3 years ago
Read 2 more answers
The table shows the fees david charges for yard work
Doss [256]
157= one hundred and fifty seven
3 0
2 years ago
Can someone help me with this 5 question quiz?
zavuch27 [327]
X= (-40,0)
y= (0,15)
May God bless you and your family
8 0
2 years ago
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