Solve Sec(2x)-4=0 for the first two positive solutions. thanks!

Evaluate -4n^2+ 11 when n= 3

jok3333 [9.3K]

Answer:

Step-by-step explanation:

999

8 0

3 years ago

Read 2 more answers

What is 50,000 times 10 to the 15th

Misha Larkins [42]

Remember property of exponents
$(x^m)(x^n)=x^{m+n}$
add exponents of same base

ok so

50,000 is 5 times 10^4

so

50000 times 10^15=
5 times 10^4 times 10^15=
5 times $10^{4+15}$ =
5 times 10^19

8 0

3 years ago

What is the solution to this system of equations? 3x-2y=5 x+2y=7 x=_, y=_

Dmitry_Shevchenko [17]

Step 1) Solve the second equation for

x

:

x

+

3

y

=

−

5

x

+

3

y

−

3

y

=

−

5

−

3

y

x

+

0

=

−

5

−

3

y

x

=

−

5

−

3

y

Step 2) Substitute

−

5

−

3

y

for

x

in the first equation and solve for

y

:

3

(

−

5

−

3

y

)

−

2

y

=

7

−

15

−

9

y

−

2

y

=

7

−

15

−

11

y

=

7

15

−

15

−

11

y

=

15

+

7

0

−

11

y

=

22

−

11

y

=

22

−

11

y

−

11

=

22

−

11

−

11

y

−

11

=

−

2

y

=

−

2

Step 3) Substitute

−

2

for

y

in the solution to the second equation at the end of Step 1 and calculate x:

x=−5−(3×−2)

x=−5−(−6)

x=−5+6

x=1

The solution is x=1 and y=−2

3 0

3 years ago

Read 2 more answers

If there are 42 boys and 54 girls in a room, fill out all of the possible ratios of boys to girls that could be made.

denpristay [2]

54:42 54/42 54,42 that is the answer

5 0

3 years ago

HELP NEEDED PLEASEEE:(

poizon [28]

Answer: b

Step-by-step explanation:

four more

+4

twice a number

n2 (we dont know the number and it’s multiplied by 2)

is

=

-10

so

n2 + 4 = -10

3 0

4 years ago

Read 2 more answers