Ninety percent of the ninth grade students at Richbartville High School take algebra. If 180 ninth grade students take algebra, how many ninth grade students do not take algebra? Please give answer and explain how to do it I'm so confused!

Answers

Answer 1

Answer: Let the total number of students be x.

Now, according to your question, 90% of x = 180

= 90/100 * x = 180

90x = 18000

Thus, x = 18000/90

= 200.

Thus, the total number of students are 200. Out of these, 180 are taking algebra. Thus, 20 students are not taking algebra.

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Explain how to solve the equation. 49= x/7Part 1
Select the correct choice below and fill in the answer box within your choice.
(Type a whole number.)

A . Subtract _from both sides.

B . Multiply both sides by _

C . Add_ to both sides.

D . Divide both sides by _

Answers

$49 = (x)/(7)$

Multiply both sides of the equation by 7

$49 * 7 = (x)/( \cancel7) * \cancel7$

$343 = x$

$x = 343$

$\green{ \rule{300pt}{3pt}}$

OptionBisthecorrectchoiceandthenumberthatcomesintheblankis7...~

Find the area of the polygon with the coordinates (1, 2), (3, 2), (3, 0), and(1,0).
2 sq. units
8 sq. units
4 sq. units
16 sq. units

Answers

Answer:

4 sq. units

Step-by-step explanation:

Since the polygon has 4 vertices, hence the polygon is a quadrilateral with four sides and four angles.

We can see that for this polygon, opposite sides are parallel and equal to each other.

To find the area of the polygon, we have to first get the length of the polygon and then the width of the polygon, hence:

The length is the distance between (1, 2) and (3, 2):

$length=√((3-1)^2+(2-2)^2) =2\ units\n$

The breadth is the distance between (3, 2) and (3, 0):

$length=√((3-3)^2+(0-2)^2) =2\ units\n$

Since length = breadth, hence this is a square.

Area= length * breadth = 2 * 2 = 4 sq. units

Which sum is irrational A.3+2

b. -6+(-3.251)

C. * first photo*

D. * 2 photo*

Answers

Square root of 19 + 7/2 would be irrational

Which shows 60^2 − 40^2 being evaluated using the difference of squares method?(A)60^2-40^2=(3600+1600)(3600-1600)=10,400,000
(B)6^2-40^2=3600-1600=2,000
(C)60^2-40^2=(60-40)^2=20^2=400
(D)60^2-40^2=(60+40)(60-40)=(100)(20)=2,000

Answers

Answer:

Option D - $60^2-40^2=(60+40)(60-40)=(100)(20)=2000$

Step-by-step explanation:

Given : Expression $60^2-40^2$

To find : Which shows expression being evaluated using the difference of squares method?

Solution :

The best method to find the difference of squares method is by using identity,

$a^2-b^2=(a+b)(a-b)$

According to question,

a=60 and b=40

$60^2-40^2=(60+40)(60-40)$

$60^2-40^2=(100)(20)$

$60^2-40^2=2000$

Therefore, Option D is correct.

D. The answer has to be 2,000, eliminating A and C. B doesn't even use the original equation, as well as incorrectly solving the method, so D is the correct answer, even if you don't understand the principles.

5y-intercept = -5Slope =T3'DO

Answers

Answer:

T3 = 30

Step-by-step explanation:

9x + 3y - 6z = 18. 6. 3x-5y+10z= 15.

10x + 4y+5z = 20

What is the value of k ?

Answers

120 hope this helps ;)

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