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3 years ago

How many real solutions are there x^2 + 3x + 10 = 0

Mathematics

1 answer:

amm18123 years ago

3 0

There are no real solutions to this problem

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Is (a + b) and (a - b)? perfect square trinomials? O True O False

lisabon 2012 [21]

Answer:

False

Step-by-step explanation:

Pos and negs cannot be perfect square trinomials

8 0

3 years ago

Read 2 more answers

Given that a 90% confidence interval for the mean height of all adult males in Idaho measured in inches was [62.532, 76.478]. Wh

NNADVOKAT [17]

Answer:

The point estimate used to estimate the mean height of all adult males in Idaho is 69.505 inches.

Step-by-step explanation:

Each confidence interval has two bounds, the lower bound and the upper bound. The points estimate used to estimate the mean is the halfway point between those two bounds, that is, the sum of those two bounds divided by two.

In this problem, we have that:

Lower bound: 62.532

Upper bound: 76.478

Point estimate: (62.532 + 76.478)/2 = 69.505

The point estimate used to estimate the mean height of all adult males in Idaho is 69.505 inches.

3 0

3 years ago

( 7x + 2x - 3x2 + 9x) + (5x + 8x2 - 6x2 + 2x - 5)

Elena-2011 [213]

Answer:

-x2+25x-5

Step-by-step explanation:

7x+2x−3x2+9x+5x+8x2−6x2+2x−5

=−x2+25x−5

3 0

3 years ago

6TH GRADE MATH I WILL GIVE BRAINLIEST HELP ASAP

dimaraw [331]

Answer:

Point D and It is equivalent to 75%

Step-by-step explanation:

6 0

3 years ago

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Find sin(a+B)

diamong [38]

Answer:

Cos A=5/13

we have

Cos² A= $1-Sin ²A$

25/169=1-Sin²A

sin²A=1-25/169

sin²A=144/169

Sin A= $\sqrt{144/169}=12/13$

again

Tan B=4/3

P/b=4/3

p=4

b=3

h= $\sqrt{3²+4²}=5$

Now

Sin B=p/h=4/5

in IV quadrant sin angle is negative so

Sin B=-4/5

CosB=b/h=3/5

Now

Sin(A+B):sinAcosB+CosAsinB

now 

substitute value

Sin(A+B):12/13*3/5+5/13*(-4/5)=36/65-4/13

=16/65 is a required answer

6 0

3 years ago