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hoa [83]
3 years ago
7

Quincy uses the quadratic formula to solve for the values of x in a quadratic equation. He finds the solution, in simplest radic

al form, to be x = \frac{-3± \sqrt{-19}}{2}.
Which best describes how many real number solutions the equation has?

A. Zero, because the discriminant is negative.
B. Zero, because the discriminant is not a perfect square.
C. One, because the negative and the minus cancel each other out.
D. Two, because of the ± symbol.
Mathematics
2 answers:
Alexxx [7]3 years ago
8 0

Answer:

<h2>A. Zero, because the discriminant is negative. </h2>

Step-by-step explanation:

I just did it.

tatiyna3 years ago
8 0

Answer:

A. Zero, because the discriminant is negative.

Step-by-step explanation:

Square root of a negative number is not real, hence no real roots

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jarptica [38.1K]

<u>The angle based on the diameter is always right</u>

Then <ABC=90 and ∠BAC=∠ACB=45° ;  and ∠BCD=180-45=135 then                x=(180-135):2=22,5°

3 0
2 years ago
I need help on this<br>​
Dvinal [7]

Answer:

1/12, 1/10

Step-by-step explanation:

P(Bead bracelet and red shoes) - 3/3 x 2 x 2

3/12=1/4 for bead bracelet

Red shoes - 1/3

Total probability for P(Bead bracelet and red shoes=1/4 x 1/3=1/12

P(Elastic bracelet and black shoes)

2/3 x 2 x 2

2/12=1/6 for elastic bracelet

Black shoes - 3/5

Total probablility for P(Elastic bracelet and black shoes)=1/6 x 3/5=3/10=1/10

Hope I helped!

5 0
3 years ago
Show work , simplifying expression
choli [55]

Answer:

100

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Define

x(x - y)²

x = 4

y = 9

Step 2: Substitute and Evaluate

4(4 - 9)²

4(-5)²

4(25)

100

6 0
3 years ago
sasha has some pennies nickels and dimes in her pocket. the number of coins is 18 the expression is 0.01p+0.05n+0.10d represents
Lapatulllka [165]

Answer:

3 pennies, 9 nickels, and 6 dimes

Step-by-step explanation:

We have three conditions:

(1)         p +        n +        d = 18

(2) 0.01p + 0.05n + 0.10d = 1.08

(3)                                   d = 2p

Multiply (2) by 100 and rearrange (3) to get a standard array.

(4)      p +   n +     d =   18

(5)      p + 5n + 10d = 108

(6)  -2p          +     d =    0

Subtract (4) from (5). This gives

(4)      p +   n +   d =  18

(7)            4n + 9d = 90

(6)  -2p          +   d =   0

Multiply (4) by 2 and add to (6). This gives

(4) p +   n +    d =  18

(7)        4n + 9d = 90

(8)        2n + 3d = 36

Double (8) and subtract from (7). This gives

(4)      p +   n +   d = 18

(7)            4n + 9d = 90

(9)                    3d = 18

Divide (9) by 3. This gives

(10) d = 6

Substitute (10) into (7). This gives

4n + 9(6) = 90

4n +   54 = 90

4n           = 36

(11) n       =    9

Substitute (10) and (11) into (4). This gives

p + 9 + 6 = 18

p +      15 = 18

p              =  3

Sasha has 3 pennies, 9 nickels, and 6 dimes.

6 0
3 years ago
5/3t−2/3(t+4)=1 What is the value of t? Enter the answer in the box.
allochka39001 [22]
T= 11 over 13 aka 11/13
4 0
3 years ago
Read 2 more answers
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