can some one help me please

Since the shape is a parallelogram, there are 2 pairs of opposite but equal sides --> "6a+21" and "20a+7"                   "11a" and "4a+7"

The easier pair is

11a = 4a+7              Subject 4a from both sides

7a = 7                     Divide 7 from both sides

a = 1

A = 1    

Answer:

Daniel is incorrect, Bella and Carlos run at 5 seconds each (Respectively), while Daniel runs at 20 seconds

Give me brainliest answer

Answer: 285.1 square yards

Step-by-step explanation:

Answer:

Amount of Niobium-91 initially

= 300/91 =3.2967mol

2040 years = 3 ×680 = 3 half-lives

therefore, amount left = 0.4121mol

mass of Niobium-91 remaining = 0.4121 ×91 =37.5g

Please give brainliest

Answer:

they want to know all the angles that are the same (congruent) s angle 8

Step-by-step explanation:

by inspection we can tell which are the same at angel 8

2,3,5 are all the same as angle 8

Answer:

20 pieces

Each roll has 36 inches of ribbon. This means that 5 rolls have 180 inches of ribbon (5 x 36 = 180).

You can then divide the 180 by 9 to find out how many 9 inch pieces the dressmaker can cut from 5 rolls of ribbon.

Equation representation:

36 inches x 5 rolls = 180 inches in total
(one roll)

180 inches ÷ 9 = 20 peices

In conclusion, the dressmaker can cut 20, 9-inch pieces from 5 rolls of ribbon.

Step-by-step explanation:

Have a great rest of your day
#TheWizzer

Answer:

B

Step-by-step explanation:

six is 6 and since 7 is last in 6.017 then 0.007 and 0.1

i hope this helps

Answer:

The words the speaker could use in the blank are...

some text added here for great reasons...

Answer:

first 15 no. only 1,2,3,4,5,6,7,8,9,10,11,12,13,14.

Answer:

160 square units

Step-by-step explanation:

First, lets focus on the triangles.

To find the area of a right triangle, we need to multiply the length by the width, and divide by 2.

(5 * 8) / 2 = 20

(And since there is two triangles, the area of the two is 40.)

To find the area of a rectangle, we need to multiply the length by the width.

15 * 8 = 120

Now we add all the areas together.

120 + 20 + 20 = 160

Is the answer is 160 square units.

Answer:

1 a,b,c,d  

2 add 8 ,divide by 5 , switch sign

3 x<4, x<6, x>13, x>-4

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

i dont really have an explanation but i got it right

Answer:

c

Step-by-step explanation:

We will see that the value of a is 12.

We have a Fibonacci sequence, and the first four terms are:

a, 2a, 3a, 5a.

Because it is a Fibonacci sequence, the next term should be the sum of the two previous ones.

3a + 5a = 8a

Then the sum of the first 5 terms is:

(a + 2a + 3a + 5a + 8a) = 228

We can solve this for a.

(1 + 2 + 3 + 5 + 8)*a = 228

19*a = 228

a = 228/19 = 12

So we conclude that the value of a is 12.

If you want to learn more about sequences, you can read:

https://brainly.com/question/7882626

Answer:

15

Step-by-step explanation:

2:7:1

=>2+7+1

=10

10/150= 15

£150 in the ratio 2:7:1 its equal to 15

Answer:

a year is 12 months so there would be 6 months in half a year

Answer:

6

Step-by-step explanation:

there are 12 months in a whole year so just divide that by 2 and you get 6!

Answer:

is 105

Step-by-step explanation:

Answer:

105°

Step-by-step explanation:

Answer:

Step-by-step explanation:

$ 50.24

Answer:

You would do this problem like a normal varible problem. x=10

Step-by-step explanation:

Since 9x is a right angle the inside would also be 9x

9x+4x+10+40=180

180 because that is how much a triangle equals

combine like terms

13x+50=180

subtract 50 from both sides

13x=130

divide by 13

x=10

Hope this helps!

Answer:

I hope this helps!

Answer:

5

Step-by-step explanation:

The highest order is x^5

Answer:

18-12

Step-by-step explanation:

difference means subtraction so it would be a subtraction problem and you just plug in the numbers and your set.

Answer:

g(x) = x² + 2

Step-by-step explanation:

If we want to shift a function down, we subtract the number we are asked to move outside the function's argument:

⇒ To shift f(x) b units down → f(x) - b

Similarly, in function notation, if we want to shift a function up, we add the number we are asked to move outside the function's argument:

⇒ To shift f(x) b units up → f(x) + b

Given function f(x) = x²

Shift 2 units up ⇒ x² + 2

Therefore, g(x) = x² + 2

Answer: 2.4% I think

12 x 20 / 100 = 2.4%

The time when there will be 20% of the initial substance remaining is 2.4%

Given that,

= 12% of 20%

= 2.4%

learn more about the substance here: https://brainly.com/question/497209

Answer:

its C :) hope this helps:))))

Step-by-step explanation:

15 times r is the amount of the rings there are 15 rings and r is equal to the price.  in the question it says it says they are equal to AT LEAST 50,000 so they could be worth more than 50k also in the question it says the case is 8000 so c is the answer becuase 8000 plus 15 times r is greater than or equal too 50k i hope this helps <3

Answer:

C

Step-by-step explanation:

Answer:

I'm not too shmert so I will guess, ok?

Answer:

see explanation

Step-by-step explanation:

using the identity

tan²x = sec²x - 1

consider the left side

(tanx + secx)² ← expand using FOIL

= tan²x + 2tanxsecx + sec²x

= sec²x - 1 + 2tanxsecx + sec²x ← collect like terms

= 2sec²x + 2tanxsecx - 1

= right side , thus proven