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Lubov Fominskaja [6]
3 years ago
6

01

Mathematics
1 answer:
aev [14]3 years ago
4 0
The is The 103.8 Cause Of the math is correct
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What is the discriminant of this equation?<br> 3x2 + 8x = 0
Likurg_2 [28]
If the 2 is an exponent, it should be marked as such.
“3x2” means 3x⋅2
“3x^2” means 3x²

3x²+8x = 0
Discriminant = 8²-4(3)(0) = 64
6 0
2 years ago
If the interest on investment is $44 when the interest rate is 5%. find the interest when the rate is 8.4%.
kolezko [41]
The interest at 8.4% is:
44\times\frac{8.4}{5}=73.92
The answer is $73.92.
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3 years ago
Find two positive numbers so that twice their sum equals their product and one number is 10 times the other number. Enter the sm
Softa [21]

Answer:

Step-by-step explanation:

We'll call the 2 numbers x and y. Starting with the last part of that first sentence "one number is 10 times the other number" can be written, in algebraic form:

y = 10x

Now on to the first statement about the numbers: "twice their sum" is 2(x + y) and "equals their product" is = xy. Putting that all together:

2(x + y) = xy and we know that y = 10x so

2(x + 10x) = x(10x) and

2(11x)=10x^2 and

10x^2-22x=0 and

x(10x - 22) = 0 so

x = 0 or 10x - 22 = 0 which makes

x equal to \frac{22}{10}=2.2

So x = 2.2 and y = 22.

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