9514 1404 393
Answer:
14. (x, y) = (1, 3)
15. $6200
Step-by-step explanation:
14. Substitution is a nice strategy for this one, since we have an expression for y. Using the second equation in the first, we get ...
4x +(2x+1) = 7
6x +1 = 7 . . . . . . . collect terms
6x = 6 . . . . . . . subtract 1
x = 1 . . . . . . . divide by 6
y = 2(1) +1 = 3 . . . . substitute for x in the second equation
The solution is (x, y) = (1, 3).
__
15. The formula for the balance when the investment earns simple interest is ...
A = P(1 +rt)
where P is the principal invested, r is the annual rate, and t is the number of years.
For the given values, we find the account balance to be ...
A = $5000(1 +0.04·6) = $5000·1.24 = $6200
Jacob will have $6200 in his account after 6 years.
Answer
203m^2
Step by Step:
Well to find the total SA of the following pyramid we need to find the area of one triangle and multiply and the square.
so let’s start with the square the square is a 7 by 7 so it’s area is 49 and the triangle has a height of 11 and a base of 7 so using to formula b*h / 2 we get 38.5 after dividing 77 by 2.
So now to get the areas of all 4 triangles we do 38.5 * 4 which is 154.
And now we add 154+49 = 203m^2.
Subtract from both sides and then divide and u will get 69
Answer:
x < 293 / 700
Step-by-step explanation:
−35x + 15 > 7/20
Multiplying all through by 20
-700x + 300 > 7
-700x > 7 - 300
-700x > -293
Divide all through by 700
- x > - 293 / 700
Multiply all through by -
x < 293 / 700
Answer:
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Step-by-step explanation: