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SVEN [57.7K]
3 years ago
12

I need help with this math question

Mathematics
2 answers:
kodGreya [7K]3 years ago
8 0

Answer:

<em>1.254 × </em>10^{11}<em>  </em>

Step-by-step explanation:

2.2 × 10^{6} * 5.7 × 10^{4} = (2.2 * 5.7) × ( 10^{6} * 10^{4} ) = 12.54 × 10^{10} = <em>1.254 × </em>10^{11}<em> </em>

Oksanka [162]3 years ago
4 0

1.254 × 10 ^11

would be the answer

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ou invested 7000 between two accounts paying 4% and 9% annual​ interest, respectively. If the total interest earned for the year
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9514 1404 393

Answer:

  • $3000 at 9%
  • $4000 at 4%

Step-by-step explanation:

Let x represent the amount invested at 9%. Then 7000-x was invested at 4% and the interest earned was ...

  9%·x +4%(7000-x) = 430

  5%·x +280 = 430 . . . . . . . . . simplify

  0.05x = 150 . . . . . . . . . . . subtract 280

  x = 3000 . . . . . . . . . . divide by 0.05

$3000 was invested at 9%; $4000 was invested at 4%.

7 0
3 years ago
the system of equations y =-3x+2 and y =1/2 x -6 is shown on the graph below. What is a reasonable estimate for the solution&gt;
Tom [10]

Answer:

The reasonable estimate for the solution is (2.29, -4.87)

Step-by-step explanation:

The reasonable estimate for the solution is the point where the two lines intersect each other.

To get the point where they intersect, we will simply equate the system of equations given as shown:

-3x+2=\frac{1}{2}x-6\\Collect \ the \ like \ terms\\-3x-\frac{1}{2}x=-6-2\\\frac{-7x}{2}=-8\\-7x=-16\\x=\frac{16}{7}    \\x=2.29

Substitute x = 2.29 into any of the equation

Using the equation y = -3x+2

y = -3(2.29)+2

y = -6.87+2

y =-4.87

This shows that the reasonable estimate for the solution is (2.29, -4.87)

Further explanation on the similar question can be found here brainly.com/question/19713330

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