The solutions for ‘x’ in the given equation are – 3 and - 7
<u>Step-by-step explanation:</u>
Given equation:
To find the ‘x’ value, try to factor, because in this case it works, it's fast. By using factor method, we get
(x + 3) (x + 7) = 0 (adding both value we get 10 and multiply as 21 as in equation and check with signs also while factoring)
x = - 3, -7
Verify above values by multiply both terms,
(x + 3) (x + 7) = 0
(so values obtained from factor method are correct)
Or, can use quadratic formula, for 
, the solutions are given by:
In the given equation, a = 1, b = 10, c = 21, apply these in above formula
So,
When 
When 
Hence, the values for ‘x’ are - 3 and - 7
He spent $5.75 on the red sand and $25.30 on the brown sand he spent a total of $31.05 on sand to fill his sand box! Hope this helps you :)
Answer:
Durability
Step-by-step explanation:
Durability in money is when objects used as money can withstand being worn out or torn. In this case, the bill is still used though it has a tear therefore it's an example of durability.
Hope it helps :)
D. All of the above. They are all rational numbers
Answer:
<h3>
D. 5 x 10⁶ ÷ 6.6 x 10⁴</h3>
Step-by-step explanation:
If 6.6 x 10^4 square miles of florida costs $5 X 10^6, then to get one square miles we will follow the given steps below;
6.6 x 10^4 mi² = $5 X 10^6
1mi² = $x
Cross multiply;
$5 X 10^6 * 1 = 6.6 x 10^4 * x
6.6 x 10⁴ x = 5 X 10⁶
Divide both sides by 6.6 x 10⁴ to get x;
6.6 x 10⁴ x /6.6 x 10⁴ = 5 x 10⁶/6.6 x 10⁴
x = 5 x 10⁶ ÷ 6.6 x 10⁴
x = 0.76*10⁶⁻⁴
<em>x = $0.76*10²</em>
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Hence the key strokes on a calculator will give the cost the United States paid for each square mile of Florida is 5 x 10⁶ ÷ 6.6 x 10⁴
