1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zalisa [80]
3 years ago
11

Find the value of the lesser root of x2 + 12x + 35 = 0. A) -7 B) -5 C) 3 D) 5

Mathematics
1 answer:
Katena32 [7]3 years ago
5 0
X2 + 12x +35 = 0
(x+5) (x+7) = 0
x + 5 = 0 x + 7 =0
x= - 5 or x= - 7
You might be interested in
Which ordered pair is the solution to the system of equations?
tiny-mole [99]

Answer:

You can use Gaussian Elimination.

Double both sides of the first equation and add the second equation.

6x + 4y = 8

5x - 4y = 3

---------------

11x      = 11

x = 1

5 - 4y = 3

-4y = -2

y = 1/2

Step-by-step explanation:

7 0
3 years ago
Martin's class has 28 students in it 25 % of those students are homesick today. How many students are home sick
lisov135 [29]
7 students are home sick
7 0
2 years ago
Pschological tests are often used to determine the hostility levels in people. High scores on the HLT pschological test correspo
algol13

Answer:  the correct answer is we are 95% confident that there is no statistically significant difference in the mean treatment  methods for hostility.  

Step-by-step explanation:

1)  Test for the equality of variances in the two groups to choose the appropriate t-test.  

H0: σ (1)^2 = σ (2)^2  

Ha: σ (1)^2 ≠ σ (2)^2  

Larger variance = 64  

Smaller variance = 49  

F = 1.30612  

Degrees of freedom 15 and 9  

Critical F from the table (with alpha=0.05) = 2.58  

Calculated F is smaller than critical F, so we use the pooled variance t-test.  

Sample 1 size 7  

Sample 2 size 8  

Sample 1 mean 79  

Sample 2 mean 84  

Sample 1 S.D. 7  

Sample 2 S.D. 8  

Pooled S.D = [(n1-1)s1^2+(n2-1)s2^2]/(n1+n2-2)

Pooled variance s = [(6)(49)+(7)(64))] / (13) =  (294+448)/13=742/13=57.076923

Pooled variance s^2 = 57.076923  

Standard error of difference in means = sqrt(1/n1+1/n2) times sqrt(s^2)  

Standard error of difference in means = (0.517549)(7.554927) = 3.910046 (denominator of t)  

Confidence interval = (mean1-mean2) +/- t SE  

t is the critical t with 24 degrees of freedom = 2.056  

(79 - 84) +/- (2.056) (3.910046)  

= (-13.04, 3.04)  

Interval encloses 0  

We are 95% confident that there is no statistically significant difference in the mean treatment  methods for hostility.  

4 0
3 years ago
The equation x = 6 represents a vertical line. True or false
Airida [17]
True, as for any line x=a
7 0
3 years ago
Read 2 more answers
HELP meeee plllzzzz !!!!!!!!!!!!!!!
aivan3 [116]

Answer:

-3

the blue dot on the no line represent -3

4 0
3 years ago
Read 2 more answers
Other questions:
  • 40 points please help
    14·1 answer
  • NEED HELP!
    9·1 answer
  • True or false: the lateral surface of cone a is exactly 1/2 the lateral surface area of cylinder b
    14·1 answer
  • Please help me on this
    14·2 answers
  • Line m passes through (4, 7) and (8, 2). Line n is parallel to line m. What is the slope
    8·1 answer
  • Thor and Zeus strike with their hammers. The higher they raise their hammers before they strike, the louder the sound of the str
    12·2 answers
  • What is the measurement of the unknown fifth interior angle of this pentagon
    14·2 answers
  • Use the substitution method to solve the system of equations. Choose the
    12·2 answers
  • How much does he receive if he is given 1.5% commission?
    6·1 answer
  • Please help! I will mark as brainliest IF answer is right. <3
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!