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USPshnik [31]
3 years ago
10

Help is very much appreciated!

Mathematics
1 answer:
mote1985 [20]3 years ago
6 0

Answer:

Step-by-step explanation:

nn

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What is 40% of 39 ?
Zarrin [17]

Answer:

15.6

Step-by-step explanation:

40% × 39 = 15.6

Hope this helps

6 0
3 years ago
What is 4 3/7 as a decimal.
Ymorist [56]
4.428571
I know because I googled it
4 0
3 years ago
Help? what do i choose
TEA [102]

Answer:

Step-by-step explanation:

So this is an isosceles triangle so the other angle must be x too.

So:

x+x+40 = 180

2x+40 = 180

2x = 140

x = 70

5 0
2 years ago
Read 2 more answers
What is the expression written using each base only once?
Murrr4er [49]
1. (-4)^-6 * (-4)^7 = (-4)^(-6+7) = (-4)^1 =
  B. -4

2. (3*10^6)*(8*10^-4) = (3*8)*10^(6-4) = 24*10^2 =
  B. 2.4*10^3
5 0
3 years ago
If (x, y) = (3, 4) is a solution of the simultaneous equations.
Vinvika [58]
The first thing you want to do is plug in x and y into both equations:

a(3) + b(4) = 4

b(3) + a(4) = 8

rearrange to line up a’s and b’s

3a + 4b = 4

4a + 3b = 8

now you want to choose a or b and multiply each equation by a number to make them have the same amount of a’s or b’s.

4(3a + 4b = 4) = 12a + 16b = 16

3(4a + 3b = 8) = 12a + 9b = 24


Now we subtract the bottom equation from the top and solve for b:

12a + 16b - (12a + 9b) = 16 - 24

7b = -8

b = -8/7


Now we plug back in for b to one of the original equations:

3a + 4(-8/7) = 4

3a + (-32/7) = 4

3a - (32/7) = 4

3a = 4 + (32/7)

3a = (28/7) + (32/7)

3a = 60/7

a = (60/7)/3 = 20/7.


Finally, plug a and b in together to double check using the second equation.

4a + 3b = 8

4(20/7) + 3(-8/7) = ?

(80/7) - (24/7) = ?

56/7 = 8.
4 0
3 years ago
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