All categories

3 years ago

Help please need help

Mathematics

1 answer:

Maksim231197 [3]3 years ago

7 0

Step-by-step explanation:

XY^2=8^2+15^2 ... (Theorem of Pythagoras)

XY^2=64+225

XY^2=289

XY=17 units

Therefore:

SinX=15/17

CosX=8/17

TanX=15/8

You might be interested in

What is the answer to the question?

Mumz [18]

Answer:

The answer is 4 zeros

Step-by-step explanation:

(6×5)×10³

30×1000=30000

Therefore 4 zeros in 30000

8 0

4 years ago

Read 2 more answers

X cubed plus 2x cubed NEED THIS ASAP

elena55 [62]

X^3+2x^2
hope this helps

5 0

3 years ago

Read 2 more answers

Within 11 years, the age of Peter will be half the square of the age he was 13 years ago. Calculate the current age of Peter. Re

OLga [1]

Answer:

ctto JBarnum

Step-by-step explanation:

P+11=(1/2)(P-13)^2

P+11=(1/2)(P^2-26p+169)

2(P+11)=(1/2)(2)(P^2-26p+169)

2P+22=P^2-26p+169

0=P^2-28p+147 ( -7 and -21)

(P-7)(P-21)=0

P=7,21 (cant be 7 as 13 years from 7 is negative so peter is 21)

checking:

21+11=32

32=(1/2)(21-13)^2

32=(1/2)(8)^2

32=(1/2)64

32=32

correct

4 0

3 years ago

Solve 3^x−5 = 9. (3 points) Select one: a. x = −3 b. x = 2 c. x = 7 d. x = 8

goldfiish [28.3K]

ANSWER

C. x=7

EXPLANATION

The given exponential equation is

${3}^{x - 5} = 9$

We rewrite the right hand side as 3 raised to exponent 2.

${3}^{x - 5} = {3}^{2}$

Observe that the base of both sides of the equation are equal.

We now equate the exponents.

$x - 5 = 2$

Solve for x,

$x = 2 + 5$

$x = 7$

The correct choice is C.

4 0

4 years ago

PLEASEEE HELPPPP!!!!!!!!!skkaksks

Vesnalui [34]

Step-by-step explanation:

(√3+√7)(√3+√7)
(√3)^2+[(√3*√7)+(√3*√7)]+(√7)^2
3+2√21+7
10+2√21

6 0

2 years ago