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almond37 [142]
3 years ago
14

Find the value of the discriminant for

x^{2} +5x+1=0" alt="7x^{2} +5x+1=0" align="absmiddle" class="latex-formula">. Then describe the number and type of roots for the equation.
Mathematics
1 answer:
kondor19780726 [428]3 years ago
7 0

Answer:

No real roots

Step-by-step explanation:

Given

7x² + 5x + 1 = 0 ← in standard form

with a = 7, b = 5, c = 1

To determine the nature of the roots use the discriminant

Δ = b² - 4ac

• If b² - 4ac > 0 then roots are real and distinct

• If b² - 4ac = 0 then roots are real and equal

• If b² - 4ac < 0 then the roots are not real

Here

b² - 4ac = 5² - (4 × 7 × 1) = 25 - 28 = - 3

Thus the 2 roots are not real

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What factors do 8 and 12 have in common​
Marina86 [1]

Answer:

the factors 1,2,4

5 0
3 years ago
Eli had $10 but he lost some of it. He mom doubled the money he had left. Eli wrote the expression 2(10-k) how much money he has
bezimeni [28]

Answer:

Step-by-step explanation:

According to the first expression:

2(10-k): where,

2:shows the double amount of money which ELI has

10:shows the amount of money which ELI had at the starting.

k:shows the amount of money which is lost.

10-k:shows the amount of money which ELI has after losing some amount.

According to the second expression:

20-2k where,

20:shows the twice of initial amount.

k: is the amount of money which is lost

2k:s hows the twice of amount which is lost

20-2k: shows the amount of money which is left with ELI after his mom gave him some money....

7 0
3 years ago
-38--25 +25-50 solve​
adoni [48]

Answer:

<h2>-38</h2>

Step-by-step explanation:

-38-25+25-50

Follow the PEDMAS order of operation

Add and subtract left (left to right )

\mathrm{Apply\:rule\:}-\left(-a\right)\:=\:+a\\-\left(-25\right)=+25\\\\=-38+25+25-50\\=-13+25-50\\-13+25=12\\=12-50\\12-50=-38

4 0
3 years ago
Read 2 more answers
Please i need help with this one​
swat32

Answer:

Step-by-step explanation:

use formula

F = 1/2*sqrt[ 4* r^2 -CD^2 ]  

F = 4.4721

4 0
2 years ago
Plz i need help and asap plus work pls and no files
AnnZ [28]

Answer:

25%

Step-by-step explanation:

so out of 32 marbles, 8 of them are red. This means the rest are blue which is 24 blue. To make a percentage, all you do is make a fraction. out of 32, 8 were red so 8/32. Fractions are basically division so 8/32 is 0.25. This means 25%.

3 0
3 years ago
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