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2 years ago

1.5 times 10 by the power of 4

1 answer:

4 0

You can write
1.5
⋅
10
5
=
15
⋅
10
4
15
⋅
10
4
−
8
⋅
10
4
=
(
15
−
8
)
⋅
10
4
=
7
⋅
10
4
Since the power is positive we move the dec.point 4 to the right:
=
70000

Hope it works

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What is the answer to 8x + 15 = 3m + 5

Naddika [18.5K]

Solving for x
x=3/8m-5/4,m

Solving for m
m=10/3+8/3x,x

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3 years ago

What is the value of x? sin49° = cosx Enter your answer in the box. x = ? °

Anni [7]

Answer:

$x = 41^{\circ}$

Step-by-step explanation:

$\sin(49^{\circ}) = \cos(90^\circ -49^\circ) = \cos (41^\circ)$

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3 years ago

Find the roots of the equation x^2+2x+5=0

stiv31 [10]

Answer:

x = - 1 ± 2i

Step-by-step explanation:

we can use the discriminant b² - 4ac to determine the nature of the roots

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

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

• If b² - ac < 0, roots are not real

for x² + 2x + 5 = 0

with a = 1, b = 2 and c = 5, then

b² - 4ac = 2² - (4 × 1 × 5 ) = 4 - 20 = - 16

since b² - 4ac < 0 there are 2 complex roots

using the quadratic formula to calculate the roots

x = ( - 2 ± $\sqrt{-16}$ ) / 2

= (- 2 ± 4i ) / 2 = - 1 ± 2i

7 0

3 years ago

Let p=x^2-2 which equation is equivalent to (x^2-2)^2+18=9x^2-18 in terms of p

Bad White [126]

Answer:

The equivalent equation is $p^2 + 18 = 9p$

Step-by-step explanation:

p is given by the following relation:

$p = x^2 - 2$

And we are given the following equation:

$(x^2 - 2)^2 + 18 = 9x^2 - 18$

On the right side, we can simplify. So

$(x^2 - 2)^2 + 18 = 9(x^2 - 2)$

Replacing $x^2 - 2$ by p, the equation is:

$p^2 + 18 = 9p$

6 0

3 years ago

The function f(a) 260 - 55x represents the distance, in miles, remaining on a trip x hours

belka [17]

Answer:

260 - 55(3)

55(3)

260 - 165

= 95

Step-by-step explanation:

8 0

3 years ago