What is the answer to “c+ 13–9c + 11”

Step-by-step explanation:

Angle ACO = 140° - x. (Sum of angles in a triangle is 180°)

Now draw the line OD. The triangles ODC and OBC are congruent via the SSS congruence property. (OD and OB are both the radius of semicircle, common side OC, and side CD = CB is given)

Hence Angle BCO = Angle ACO = 140° - x.

Since triangle OBC is an isosceles triangle with OC = OB, this means that Angle CBO is also 140° - x.

By Exterior Angle theorem,

we have Angle AOC = Angles BCO + CBO

=> x = (140° - x) + (140° - x)

=> 3x = 280°

=> x = 280°/3. (B)

Answer: Nine I think

Step-by-step explanation: maybe because 3x3 would equal 9 and 9x1 equals 9

Answer:

Step-by-step explanation:

You need to make a shape that is the same shape and size to the triangle on the page.

Answer:

12

Explanation:

21 ÷ 7 × 4

21 ÷ 7 = 3

3 * 4 = 12

Answer:

12

Step-by-step explanation:

So..... multiplication can be done at the same time as division, so we don't have to worry about the order of operations :)

so, 21 divided by 7 is 3

then, you multiply 3 by 4, which is 12

and btw, I also found another methoddddddddddddd

you can do, 21 times 4, which is 84, divided by 4 times 7, which is 28

84 divided by 28 is 3

then you multiply it by 4, it gives 12

and btw, that also works for other numbers too!!!!!!!!!!!!

9514 1404 393

Answer:

  5n -3

Step-by-step explanation:

Try n=1 in each expression and see which gives you a first term of 2.

  2-5n = 2-5·1 = -3

  2n -5 = 2·1 -5 = -3

  5n -3 = 5·1 -3 = 2 . . . . . this is the expression you want

  5n +2 = 5·1 +2 = 7

__

Additional comment

For a common difference of 5, the coefficient of n must be 5. The second answer choice fails on that count also.

Answer:

5n-3

Step-by-step explanation:

Answer:

5X=90

Step-by-step explanation:

5x=90

5x=90

5    5

x=18

Answer:

r=9

Step-by-step explanation:

Answer:

y= 45

x=9

Step-by-step explanation:

plug 5x into y since y=5x:

5x=4x+9

-4. -4

x=9

5(9)=45

Answer:

x=9 y=45

Step-by-step explanation:

y=4x + 9.......(1)

y= 5x.........(2)

Substitute 5x for y in equation 1.

5x= 4x + 9

5x - 4x = 9 (Collect like terms 5 and 4 have x in common if +4 crossover it changes to -4)

x = 9

substitute 9 for x in equation 2.

y = 5(9)

y = 5 x 9(multiplication)

y = 45

Answer:

Step-by-step explanation:

Answer:

19.26%

Step-by-step explanation:

Given the original selling price of DVD player as ​$179.30 and the new sale price to be ​$144.77, the the first step in finding the percent​ markdown is to take the difference between the original selling price and the sale price to give $179.30 - $144.77 = $34.53

Percent markdown = original selling price- new sale price/original selling price × 100%

Percent markdown = $34.53/$179.30 × 100%

% markdown = 19.26%

Answer: its 3 x 10^4

Step-by-step explanation:

i got it correct on my test

Answer: 3 x 10^4

so the third option hope this helps.

Answer:

yes -9 Is greater than -10

Answer: I think it’s 8

Step-by-step explanation: because it can’t be the other ones

Answer:

Step-by-step explanation:

f(z)=3(-9)^2+10(-9)-6

f(z)=3(81)-90-6=243-96=147

Answer:

So if 60% of the 100% they have hopes to acheive is done, 40% of the remaining funds are left to achevie. I know, such questions are so simplistic you wonder if they are tricking you

Step-by-step explanation:

Answer:

x-intercept: (2,0)

y-intercept: This line doesn't cross the y-axis.

Answer: Same Side Interior Angles

Step-by-step explanation:

Imma help you eliminate the options.

-These angles are inside the parallel lines, meaning that they have to be interior angles. That eliminates any answers involving exterior angles. Next, simply by definition, it wouldn't be corresponding. Finally, alternate interior angles is eliminated because the angles are on the SAME SIDE of the transversal, meaning that Same-Side interior angles is the answer.

Answer:

√x=√25.......x=5

Step-by-step explanation:

√25-5=0

5-5=0

Answer:

√x-5=0

√x=5

squaring both side

√x²=5²

x=±25

Answer:

300ft^2

Step-by-step explanation:

The above equation equals -27

Answer: 45 cups of flower

Step-by-step explanation:

Hi, you can use a proportion to solve this problem, so you start of by setting up the proportion:

Step-by-step explanation:

To start, create a ratio for flour to chocolate chips

flour : chocolate chips

5 cups : 3 cups

5:3

Now create a ratio with x amount of flour to 27 cups of chocolate chips

x cups of flour: 27 cups of chocolate chips

x: 27

Rewrite the ratios as fractions equivalent to each other

[tex]\frac{5}{3}[/tex] = [tex]\frac{x}{27}[/tex]

Cross multiply

5(27) = 3x

135 = 3x

135/3 = 3x/3

45 = x

45 cups of four would be needed

I hope this helps!!!!!

Answer:

the little box would indicate that it is a 90 degree angle.

Answer: 50

Step-by-step explanation: to find CXF all you need to do is 90-40

Answer:

x = 42 degrees

y = 14 degrees

Step-by-step explanation:

Solve for x

180 - 96 = 2x

2x = 84

x = 84/2

x = 42

Solve for y

180 - 94 - 44 = 3y

3y = 42

y = 42/3

y = 14

Hope it helps :)

Answer:

$2.45

Step-by-step explanation:

First, we find how much 20% of 12.25 is:

we can convert 20% directly to a decimal:

20% = 0.2  

Then we find

20% of 12.25 = 0.2 x 12.25 = 2.45

So Maria's tip would be $2.45

Answer:  A. 2 17 /21

Step-by-step explanation:you divide them.You change both mixed number to improper fraction.which is 236  /9  divide  28 /3.You do kcf which stand for KEEP CHANGE FLIP.YOU KEEP 236/9 and change Divide to mulipction sign and flip 28/3 to 3/28.You multiply236  /9  and  28/3 which gives u 708  /252.After that u simply it to 59 /21 .Lastly change back to mix number which is 2 17/21.

Hope it helps bye ;)