Which expression is equivalent to: 3^2 x 3/ 3^4

In a class 26 of students, 17 have a brother and 7 have a sister. There are 4 students who do not have any siblings. What is the

Anni [7]

Number of students = 26
Number of students without siblings = 4
⇒ Number of students with at least one siblings = 26 - 4 = 22

Number of students with brothers = 17
Number of students with sisters = 7
⇒ Number of students with both a brother and a sister = 17 + 7 - 22 = 2

P(student has a brother, given that they have a sister) = 2/7

Answer: 2/7

6 0

3 years ago

3a+2x-3y=15<br>Solve for a.<br>Then Solve put the value for a =<br>a+7÷10

erma4kov [3.2K]

$\huge\bf Question:–$

$\sf \longmapsto \: 3a+2x−3y=15$

$\bf \huge \: To \: Find:–$

$\boxed{\bf \: Value\: of \: A}$

$\huge\bf Solution:–$

$\sf \longmapsto \: 3a+2x−3y=15$

$\boxed{ \bf \: Add -2x \: to \: both \: sides}$

$\sf \longmapsto \: 3a+2x−3y+−2x=15+−2x$

$\sf \longmapsto \: 3a−3y=−2x+15$

$\boxed{ \bf \: Add \: 3y \: to \: both \: sides}$

$\sf \longmapsto \: 3a−3y+3y=−2x+15+3y$

$\sf \longmapsto \: 3a=−2x+3y+15$

$\boxed{\bf \: \: Divide \: both \: sides \: by \: 3}$

$\sf \longmapsto \: \dfrac{3a}{3} = \dfrac{−2x+3y+15}{3}$

$\boxed{\bf \: Cross \: Multiply}$

$\boxed{\sf \longmapsto \: a = \dfrac{ - 2}{3} x + y + 5}$

______________________________________

$\bf \: Put\:The\: Value$

$\sf \longmapsto \: \dfrac{−2x+3y+15}{3} +7÷10$

$\boxed{\bf \: Distribute}$

$\sf \longmapsto \: \dfrac{ - 2}{3} x+y+5+ \dfrac{7}{10}$

$\boxed{\bf \: Combine \: Like \: terms}$

$\sf \longmapsto \: \bigg( \dfrac{ - 2}{3} x\bigg) + y +\bigg( 5 + \dfrac{7}{10} \bigg)$

$\sf \longmapsto \: \dfrac{ - 2}{3} x + y + \dfrac{57}{10}$

______________________________________

$\boxed{\bf The Answer\: is:–}$

$\boxed{{\underline{\bf\dfrac{ - 2}{3} x + y + \dfrac{57}{10}} }}$

8 0

2 years ago

Read 2 more answers

What is the perimeter of parallelogram WXYZ

Tomtit [17]

Answer:

Step-by-step explanation:

Given a parallelogram with points

X(4, 0)

W(0, -1)

Y(3, -2)

Z(-1, -3)

We want to find the perimeter, perimeter is the total sum of the lengths

So, we need to find the length of the sides using distance between two points

D = √(x2-x1)² + (y2-y1)²

So, applying this

WX = √(0-4)²+(-1-0)² = √(16 + 1) = √17

XY = √(4-3)² + (0--2)² = √(1+4) = √5

Since the opposite sides of a parallelogram are equal, we don't need to find the other length

Then,

Perimeter = 2(WX + XY)

Perimeter = 2(√17 + √5)

Perimeter = 2√17 + 2√5

The correct answer is B.

8 0

3 years ago

What is the first derivative of:<br> sin(x)*cos(x)/(x^2-x)

lidiya [134]

Answer:

that's the answer

Step-by-step explanation:

for the next time, dont post you derivative questions on brainly, there is a lot of websites that can solve this for you with steps.

6 0

2 years ago

Find the indicated function value for csc -450°

Mekhanik [1.2K]

Step-by-step explanation:

$\csc( - 450 \degree) \\ \\ = - \csc450 \degree \\ \\ = - \csc(360 \degree + 90\degree) \\ \\ = - \csc( 90\degree) \\ \\ = - 1$

4 0

4 years ago