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astra-53 [7]
3 years ago
13

Does any one know the answer to this thank you

Mathematics
1 answer:
makvit [3.9K]3 years ago
8 0

Answer:

The First choice

Step-by-step explanation:

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SOMEONE PLEASE HELP ME ASAP PLEASE!!!​
Alex17521 [72]

Answer:

BC=10

Step-by-step explanation:

BD-BC=14-4=10

4 0
2 years ago
Read 2 more answers
Please help me out and with work included
irina1246 [14]
Hope that makes sense


3 0
2 years ago
Solve the following by elimination method <br> 11x+15y+23=0 and 7x-2y-20=0
mr Goodwill [35]
Let 11x + 15y + 23 = 0 be equation (1)
And 7x - 2y - 20 = 0 be equation (2)

Multiply equation (1) by 2:
22x + 30y + 46 = 0

Multiply equation (2) by 15:
105x - 30y - 300 = 0

Add equations (1) and (2):
22x + 105x + 30y - 30y + 46 - 300 = 0
127x - 254 = 0
127x = 254
x = 254/127
[x = 2]

Substitute x = 2 in equation (1) to find y:
11(2) + 15y + 23 = 0
22 + 15y + 23 = 0
15y + 45 = 0
15y = -45
y = -45/15
y = -3

Therefore, x = 2 and y = -3.
7 0
3 years ago
This is really confusing. Thanks for helping.
Mandarinka [93]
Count change of signs to tell positive roots
then replace x with -x and evaluate, then count change in sign for negative roots


initially
+, -, -, +, +, -
3 changes
3 or 1 positive roots


replacing x with -x
-,-,+,+,-,-
2 changes
2 or 0 negative roots



B is answer
5 0
3 years ago
38 is is 10 times as much as
boyakko [2]
38 is 10 times more than 3.8
3 0
2 years ago
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