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2 years ago

I need help please can’t find it

Mathematics

1 answer:

nordsb [41]2 years ago

8 0

Answer:

Step-by-step explanation:

log(7)6+log(7)2^3

log(7)6+log(7)8

log(7)(8*6)

log(7)48 = > D is the correct answer.

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Three less than a certain number is 9. Find the number.

lilavasa [31]

12 is the correct answer

7 0

3 years ago

Read 2 more answers

1) 3 (x - y)² - 10 (x-y) + 8

katovenus [111]

Answer:

$(3x-3y-4)(x-y-2)$

Step-by-step explanation:

Given expression:

$3(x-y)^2-10(x-y)+8$

Let u = (x - y):

$\implies 3u^2-10u+8$

To factor a quadratic in the form $ax^2+bx+c$ find two numbers that multiply to $ac$ and sum to $b$ :

$\implies ac=3 \cdot 8=24$

$\implies b=-10$

Therefore, the numbers are: -6 and -4.

Rewrite $b$ as the sum of these two numbers:

$\implies 3u^2-6u-4u+8$

Factor the first two terms and the last two terms separately:

$\implies 3u(u-2)-4(u-2)$

Factor out the common term (u - 2):

$\implies (3u-4)(u-2)$

Substitute back in u = (x - y):

$\implies (3(x-y)-4)((x-y)-2)$

Simplify:

$\implies (3x-3y-4)(x-y-2)$

3 0

2 years ago

Trigonometry problem. Please show your solution and explain it. thank you !!

WINSTONCH [101]

Cute one!

Summarizing:
sec(acot(tan(asin(sin(pi/3)))) .... use asin(sin(x))=x
=sec(acot(tan(pi/3)))
=sec(acot(sqrt(3))) ......... use acot(x)=atan(1/x)
=sec(atan(1/sqrt(3)))
=sec(atan(sqrt(3)/3)) .... evaluate atan(sqrt(3)/3), use unit circle
=sec(pi/6)
=1/cos(pi/6)...... evaluate cos(pi/6), use unit circle
=1/(sqrt(3)/2)
=2/sqrt(3) .... now rationalize
=2sqrt(3)/3

7 0

3 years ago

Which of the following is a radical equation?

Komok [63]

Answer:

C. $\sqrt{x}+3=13$

Step-by-step explanation:

We know that,

A radical equation is the equation in which the variable is under the radical.

According to the options, we see that,

In the equation $\sqrt{x}+3=13$ , the variable is under the radical.

All other equations have constant number under the radical.

Thus, we get,

Equation C i.e. $\sqrt{x}+3=13$ is a radical equation.

6 0

3 years ago

Read 2 more answers

Two fractions have the same denominator,8. The sum of the two fractions is ½. If one of the fractions is added to 5 times the ot

Alborosie

Answer:

3/8 and 1/8

Step-by-step explanation:

8 0

3 years ago