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Korvikt [17]
3 years ago
6

Find the solution set for this equation. a2 + 7a=0

Mathematics
1 answer:
aivan3 [116]3 years ago
5 0

Answer:

Either a= -7 or a= 0

Step-by-step explanation:

Pull out like factors:

a2 + 7a  =   a • (a + 7)

 a • (a + 7)  = 0

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a local charity held a crafts fair selling donated,handmade items. Total proceeds from the sale were $1,875. A total of 95 items
Lana71 [14]
15x+25y=1875
Let
y=95-x
15x+25 (95-x)=1875
Solve for x
15x+2375-25x=1875
15x-25x=1875-2375
-10x=-500
X=500/10
X=50 the number of $15 items

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5 0
3 years ago
What is the number of terms in this geometric series?<br> 1+2+4...+128
Stella [2.4K]
The answer is : a^2=1 x 2^n-1

To check if it’s correct

a^2= 1 x 2^2-1

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Hope this helps!



5 0
3 years ago
Which is not in proportion a) 2 : 4 = 3 : 6 b) 1 : 3 = 3 : 9 c) 4 : 6 = 3 : 2 d) 5 : 1 = 10 : 2
Gnoma [55]

Answer:

C

Step-by-step explanation:

(a)

2 : 4 ( divide both values by 2)

= 1 : 2

3 : 6 ( divide both values by 3 )

= 1 : 2

Thus 2 : 4 = 3 : 6

(b)

3 : 9 ( divide both values by 3 )

= 1 : 3

Thus 1 : 3 = 3 : 9

(c)

4 : 6 ( divide both values by 2 )

= 2 : 3 ≠ 3 : 2

(d)

10 : 2 ( divide both values by 2 )

= 5 : 1

Thus 5 : 1 = 10 : 2

3 0
3 years ago
Simplify the expression given below.<br> (732 - 83 + 21) + (-1363 - 11.2 + 133 + 19)
Vera_Pavlovna [14]

Answer:

732−83+21−1363−11.2+133+19= −552.2

8 0
3 years ago
Read 2 more answers
-12x+ 16 = 100<br> what is the value for x in this equation?
AveGali [126]

Answer: X= -7

Step-by-step explanation: A negative time a negative is a positive so -12x-7 is equal to 84. 84 plus 16 is equal too 100.

7 0
3 years ago
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