I’ll award you brainliest if you answer this question

answer:

$2353 at 12.5% and $7647 at 8.25%

step-by-step explanation:

i'll say a is the amount he invested in one market, and b is the amount in the other.

a + b = 1, or b = 1 - a

multiplying the investments with the percentages and adding them together will give the total earned interest.

(a × 0.125) + (b × 0.0825) = 925

0.125a + 0.0825b = 925

use substitution to solve for a.

0.125a + 0.0825(1 - a) = 925

0.125 a + 825 - 0.0825a = 925

0.0425a = 100

a = 2352.94

use substitution to find b

b = 1 - 2352.94

b = 7647.06

the questions are to the nearest dollar so round a and b.

$2353 and $7647

answer:

12   ≤x

step-by-step explanation:

2x+7 ≤3x-5

subtract 2x from each side

2x-2x+7 ≤3x-2x-5

7   ≤x-5

add 5 to each side

7 +5 ≤x-5+5

12   ≤x

answer:

√(7·x + 14) + √(7 - x)

7·x + 14 ≥ 0 --> x ≥ -2

7 - x ≥ 0 --> x ≤ 7

x ∈ [-2 ; 7]