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vichka [17]
3 years ago
6

what is true about the solutions of a quadratic equation when the radical in the quadrant formula is negative

Mathematics
1 answer:
lisov135 [29]3 years ago
3 0

Since the square root of a negative number is not a real number, then a negative radical will result in no real solution.

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Use compound interest to find the total amount for $845 at 1.25% for 6.5 years
densk [106]

Answer:

$911.02

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 1.25%/100 = 0.0125 per year,

then, solving our equation

I = 845 × 0.0125 × 6.25 = 66.015625

I = $ 66.02

The simple interest accumulated

on a principal of $ 845.00

at a rate of 1.25% per year

for 6.25 years is $ 66.02.

8 0
2 years ago
Which of the following represents a valid first step to solving this system of equations using the substitution method?
Phoenix [80]

Answer:

2(2y - 1) - y = 7

Step-by-step explanation:

I guess the 2 equations are

2x - y = 7

x = 2y - 1

substitution message that you use one equation to express one variable by the other, and then you use that in the other equation to get one equation for one variable. then you solve for that, and use that result in the first equation to since for the second variable.

the equations are already defined that way, that the second equation directly defines x as an excision of y.

so, this needs to be used then in the first equation.

and that makes

2(2y - 1) - y = 7

the correct first step.

7 0
2 years ago
Which statements are true? *<br> 1:2 = 50:100<br> 2:1 = 50:100<br> 1:2 = 2:1<br> 3:4 = 9:12
Bumek [7]
1:2 = 2:1 is the statement
6 0
3 years ago
X+2y=-8 find the slope ​
laila [671]

Answer:

 Slope = -1.000/2.000 = -0.500

 x-intercept = -8/1 = -8.00000

 y-intercept = -8/2 = -4

Step-by-step explanation:

Step  1  :

Equation of a Straight Line

Graph of a Straight Line

Calculate the Y-Intercept

Calculate the Slope

Calculate the X-Intercept

<em><u>Answer: </u></em>Slope = -1.000/2.000 = -0.500

<em><u>Hope this helps.</u></em>

7 0
3 years ago
Read 2 more answers
What is the domain of the function f(x) = sqrt 7x+21
timurjin [86]

\text{if is}\ f(x)=\sqrt{7x+21}\ \text{then the domain is:}\\\\7x+21\geq0\ \ \ |-21\\7x\geq-21\ \ \ \ |:7\\x\geq-3\to x\in[-3;\ \infty)


\text{If is}\ f(x)=\sqrt{7x}+21\ \text{then the domain is:}\\\\7x\geq0\ \ \ |:7\\x\geq0\to x\in[0;\ \infty)

6 0
3 years ago
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