letter a................

Answer:

0.600

Step-by-step explanation:

Answer:

4 students is 20% of 20 students.

Step-by-step explanation:

We can say that 20 students represent 100% and that 4 students represent x% of all students. Then we can use the proportion: 20 : 4 = 100 : x, or 20 / 4 = 100 / x. Then we will cross multiply: 20 x = 4 * 100, 20 x = 400, x = 400 : 20 , x = 20 %. Also we can say that 4 = 1/5 * 20 and 1/5 * 100 = 20 %

4 students are 20 percent of 20 students.

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion, therefore, refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.

We can say that 20 students represent 100% and that 4 students represent x% of all students.

Thus, we can use the proportion:

20 : 4 = 100: x, or 20 / 4 = 100 / x.

cross multiply

20 x = 4 * 100

20 x = 400

x = 400: 20

x = 20 %.

therefore, we can say that 4 students are 20 percent of 20 students.

Learn more about percentages here:

https://brainly.com/question/29306119

#SPJ2

Note: Consider we need to find the vertices of the triangle A'B'C'

Given:

Triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C'.

Triangle A,B,C with vertices at A(-3, 6), B(2, 9), and C(1, 1).

To find:

The vertices of the triangle A'B'C'.

Solution:

If triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C', then

[tex](x,y)\to (y,-x)[/tex]

Using this rule, we get

[tex]A(-3,6)\to A'(6,3)[/tex]

[tex]B(2,9)\to B'(9,-2)[/tex]

[tex]C(1,1)\to C'(1,-1)[/tex]

Therefore, the vertices of A'B'C' are A'(6,3), B'(9,-2) and C'(1,-1).

Answer:

100

Step-by-step explanation:

Answer: D 95 siguro

Step-by-step explanation:makinig ka kasi ha.

Answer:

C. 80

Step-by-step explanation:

The first point is (3, 240) Divide them and you get 80.

Answer:

B: 1/64

Step-by-step explanation:

2^3 = 8

8^(-2)=1/(8^2)=1/64

Answer:

x = 3                                x = -15

Step-by-step explanation:

|2x + 12| = 18

There are two solutions to an absolute value equation, one positive and one negative

2x+12 = 18            2x+12 = -18

Subtract 12 from each side

2x+12-12 = 18-12            2x+12-12 = -18-12

2x = 6                             2x = -30

Divide by 2

2x/2 = 6/2                     2x/2 = -30/2

x = 3                                x = -15

Answer:

firstly covert it like 7   1/4

= 4x7+1 = 29 so 29/4

Step-by-step explanation:

and then find difference by making denominators same

Answer: 0.9974

Step-by-step explanation:

Let X be the random variable that follows the normal distribution \.

If mean ([tex]\mu[/tex]) = 10 and standard deviation ([tex]\sigma[/tex]) =1

then, the probability of selecting a number between 7 and 13 = [tex]P(7<X<13)[/tex]

[tex]=P(\dfrac{7-10}{1}<\dfrac{X-\mu}{\sigma}<\dfrac{13-10}{1})[/tex]

[tex]=P(-3<z<3)[/tex]                     [Since [tex]z=\dfrac{X-\mu}{\sigma}[/tex]]

[tex]=P(z<3)-P(z<-3) \ \ \ [P(z_1<Z<z_2)=P(Z<z_2)-P(Z<z_1)]\\\\= P(z<3)-(1-P(z<3))\ \ \ [P(Z<-z)=1-P(Z<z)]\\\\=2P(z<3)-1\\\\=2(0.9987)-1\ \ [\text{By p-value table}]\\\\= 0.9974[/tex]

Hence, the probability of selecting a number between 7 and 13 is 0.9974.

Step-by-step explanation:

5th one = 39 + 7 = 46

6th one = 46 + 9 = 55

7th one = 55 + 11 = 66

they're increasing in odd numbers 1,3,5,7,9,11 so I added em to the numbers^^

Answer:

x and y

if x is 0 y is 2 (0,2)

if x is 4 y is 10( 4,10)

if x is -1 y is 0 (−1,0)

Step-by-step explanation:

Answer:

-5x + 8y = -21

3x - 4y = 15

8y = 5x - 21

y = 5/8x - 21/8

3x - 4y = 15

-4y = -3x + 15

y = 3/4x - 15/4

5/8x - 21/8 = 3/4x - 15/4

-1/8x = -9/8x

x = 9

3x - 4y = 15

3(9) - 4y = 15

27 - 4y = 15

-4y = -12

y = 3

(9, 3)

Answer:

  (9, 3)

Step-by-step explanation:

My favorite way to solve equations like this is using a graphing calculator. For Desmos, one only needs to type the equations into the input column, click on one of them, and highlight the point of intersection to see the coordinates there.

__

The usual ways to solve these are by substitution or elimination. Another way they can be solved is using Cramer's rule, which provides a formula for the solution based on the coefficients.

  ax +by = c

  dx +ey = g

__

  x = (bg -ec)/(bd -ea) . . . . . . note the crossing pattern of the values in the products

  y = (cd -ga)/(bd -ea) . . . . . . the denominator is the same as above

__

Using these formulas, we get ...

  x = (8(15) -(-4)(-21))/(8(3) -(-4)(-5)) = (120 -84)/(24 -20) = 36/4 = 9

  y = (-21(3) -15(-5))/4 = (-63 +75)/4 = 12/4 = 3

The solution is (x, y) = (9, 3).

Doing the same by elimination involves the same amount of math and a lot more writing.

Answer:

x = -4/17

Step-by-step explanation:

After t minutes, Tank A contains

6000 gal - (2 gal/min) t

while Tank B contains

8250 gal - (3 gal/min) t

The two tanks hold the same amount of water when these quantities are equal. Solve for t :

6000 gal - (2 gal/min) t = 8250 gal - (3 gal/min) t

(1 gal/min) t = 2250 gal

t = (2250 gal) / (1 gal/min) = 2250 min

Let's solve your inequality step-by-step.

9−4(x+4)≤7+4(5x+7)

Step 1: Simplify both sides of the inequality.

−4x−7≤20x+35

Step 2: Subtract 20x from both sides.

−4x−7−20x≤20x+35−20x

−24x−7≤35

Step 3: Add 7 to both sides.

−24x−7+7≤35+7

−24x≤42

Step 4: Divide both sides by -24.

−24x

−24

≤

42

−24

x≥

−7

4

Answer:

x≥

−7

4

Answer:

60 minutes or 1 hour

Step-by-step explanation:

My picture is my worked out solution :)

Answer:

An hour

Step-by-step explanation:

Answer:

A foot is 12 inches and 4 is closer to 0 than 12 meaning 13 ft 4 in simplified is 13 ft

Step-by-step explanation:

Answer:

$0.48

Step-by-step explanation:

2.40/5 = 0.48

Answer:

100,000+2,000+400+50+3

Step-by-step explanation:

Answer:

100,000+2,000+400+50+3

Answer:

$0.67

Step-by-step explanation:

8.04=12x

8.04=12x

12.     12

.67=x

Answer:

true

Step-by-step explanation:

every number is a real number

total amount is $46.75 and if they split the cost it is $15.58

Answer:

D. 3x - 7 = 8

I hope this helps!

Step-by-step explanation:

3x - 7 = 8

3x =8 +7

3x = 15

x =5

Answer:

D

Step-by-step explanation:

1%