jane is twice as old as Barbara. Michael is 7 years older than Jane. If Michael is 21, which equation could be used to find Barbara's age

Answers

Answer 1

Step-by-step explanation:

J = 2b

M = J + 7

M = 21

J = 21 - 7

J = 14

B = 7

Equation:

If M is J+7, so then J = 21-7. J is 2*b, so 2*b = 21-7. Then you subtract and divide.


Related Questions

Help due in 1o mins!!!

Answers

Answer:

c = 15

Step-by-step explanation:

The angles are4 a linear pair and are supplementary, so the sum of their measures is 180 deg.

7c - 7 + 6c - 8 = 180

13c - 15 = 180

13c = 195

c = 15

The answer should be 15.

Explanation:
The line equates to 180, so you would put both equations (7c-7 , 6c-8) together and equal it to 180°.
So, it would come out looking like this:
7c-7+6c-8=180.

You’d add 7c and 6c to get 13c, and then subtract -8 from -7 (-7-8) to get -15.
The equation would now look like this.
13c-15= 180.

You’d add 15 to 180 to get 195. Then, you’d divide 195 by 13 to get 15, which would mean c=15.

PLEASE HELP ITS DUE IN 3 MIN WILL MARK BRAINLEST

Answers

Answer:60mm

Step-by-step explanation:

288,000 π = (4/3)πr³

Divide both sides by π

288,000 = (4/3)r³

Multiply both sides by 3/4

216,000 = r³

Take the cube root of both sides

60 = r

_______ × 0.89 > 0.89 whats answer

Answers

I think the answer is one.

I think this because since it’s times you would do backwards and divide 0.89 divided by 0.89 and you would get 1. I hope I’m correct sorry if I’m not.

Answer:

the answer can be anything greater than 1

Step-by-step explanation:

Solve for w: 30= 6/5w

Answers

Answer:

w = 25

(Hope this helps! Btw, I am the first to answer.)

Answer:

[tex]w = \boxed{\frac{1}{25} }[/tex]

Step-by-step explanation:

[tex]if \:: 30= \frac{6}{5w} \\ (30) \times (5w) =( 6) \times (1) \\ 5w = \frac{6}{30} \\ 5w = \frac{1}{5} \\ (5) \times (5) \times (w) = (1) \times (1) \\ w = \frac{1}{(5) \times (5)} \\ w = \frac{1}{ {5}^{2} } = \frac{1}{25} [/tex]

Find the length of DB and EC given the length of FB is

Answers

Answer: DB=31.66and EC=49.32

Step-by-step explanation:

You have a bid of $250 per room for 180 guest rooms. You want to comp 12 rooms for the upcoming teacher convention. What is your average room rate across the paid and free rooms? Round to the nearest dollar.

a) $234
b) $244
c) $250
d) $254

Answers

Answer:

C

Step-by-step explanation:

At Quality Tees, shirts sell at a
rate of $12.50 per shirt, with a
flat shipping rate of $8. Tony
spent a total of $83. How many
shirts did Tony purchase?

Answers

the answer is 6 shirts


12.5x+8=83
12.5x=83-8
12.5x=75
x=75/12.5
x=6

by how much is the product of 2 1/2 and 2/5 less than 4​

Answers

Answer:

3

Step-by-step explanation:

Help PLEASE I'll mark u brainliest

Answers

Answer:

c

Step-by-step explanation:

multiply 14 and 6 to find the area of base

hope this helps :)

14 X 6 = 84
84 X 11 = 924

base x width x height

ANSWER: 924 sq. inches

a que fraccion es equivalente 2 1/3​

Answers

Answer:

Step-by-step explanation:

2 = 6/3

2⅓ = 6/3 + 1/3 = 7/3

Can someone plzz help this assignment is due in 15 minutes and I really need help on some questions!!! Ms. Martinez, an experienced typist,
averages only 3 errors in 500 words.
On the average, what percent of the
words that Ms. Martinez types
contain mistakes?

Answers

Answer:

0.6%

Step-by-step explanation:

divide 3 by 500

get 0.006 and move decimal back 2 places to give the percent

Please help, I couldn’t play attention today in class so I don’t understand this.

Thanks if you help

Answers

Answer:

a.0       b. 33.5

Step-by-step explanation:

absolute value means everything turns positive.

5-6=-1 +1=0

b. 2(16.75)= 33.5.

everything inside the bracket turns positive.

For part A
|5-6+1|

You either calculate the sum or difference to this equation and would turn out to be 0 as your answer

|5-6+1|=0

Therefore 0 is the answer to |5-6+1| for part A

For part B
2|-16.75|
The absolute value of any number is always positive

2*16.75

You then multiply it and then come up with 33.5


Therefore 33.5 is the answer for 2|-16.75| in part B.

2|-16.75|

Hope this helps~

5.2 × _______ = 5.2 whats the answer

Answers

Answer:

1

Step-by-step explanation:

Simplify the following expression. 3 ^11/5 dived 3-^9/5

Answers

Answer:

81 is the answer cause u just have to aolve the 3^11^5 first ana comes and divide with the answer ot 3^-9/5.

Evaluate the expression pleasse :)!!! I hate my anxiety:)


(0.4)(−3.5)(−9)

Answers

12.6 is the answer. Hope this helps :)

A computer that originally costs $929 was returned to the electronics
store. Because the box was opened, the store put it on the clearance
rack for 35% off. What is the price of the computer?

Answers

Answer:

32.15

Step-by-step explanation:

needhelp

select the correct answer
what are the ratios equvialnt to each other
a 1:6 and 2:9
b 2 :23 and 4:8
c 1:64 and 4:16
d 1:16 and 4:64

Answers

D. 1:16 and 4:64 are equivalent
D. 4:64 simplified is 1:16 so they are equal

What’s the a and b from the quadratic function

Answers

Answer: a=1 b=-4

Step-by-step explanation:

Apply the equation y= a^2+bx+c


The list shows the numbers of each type of pie baked at a bakery today.
• 13 apple
• 4 pecan
• 3 pumpkin
What percentage of the pies baked today were NOT apple?

Answers

35%, because the apple pies account for 65% of the pies made

The percentage of pies baked that were not apple was 33.33 %

What is Percentage?

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, %

Given data ,

The number of apple pies baked at the bakery = 13

The number of pecan pies baked at the bakery = 4

The number of pumpkin pies baked at the bakery = 3

So ,

Total number of pies baked at the bakery =
Number of apple pies baked at the bakery + Number of pecan pies baked at the bakery + Number of pumpkin pies baked at the bakery

Total number of pies baked at the bakery = 13 + 4 + 3

                                                                      = 21

Now ,

The number of pies that were not apple = Number of pumpkin pies baked at the bakery + Number of pecan pies baked at the bakery

The number of pies that were not apple = 4 + 3

                                                                   = 7

And ,

The percentage of pies that were not apple =

( The number of pies that were not apple / Total number of pies baked at the bakery ) x 100 %

The percentage of pies that were not apple = ( 7 / 21 ) x 100 %

                                                                         = ( 1 / 3 ) x 100 %

                                                                         = 33.33 %

Hence , the percentage of pies that were not apple is 33.33 %

To learn more about percentages click :

https://brainly.com/question/12861068

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The number of bacteria in a certain population increases according to a continuous exponential
growth model at a rate of 8.1% per hour. There are 1800 bacteria at t = 0.
Write an equation that gives the number of bacteria after t hours.

Answers

Answer:

Step-by-step explanation:

Calculate the mean: 5, 4, 8, 12, 15

Answers

Answer: 5

Step-by-step explanation:

answer=8.8

the mean is 5+4+8+12+15= 44
44 divide by 5= 8.8

Can't get my head around this at all any help would be greatly appreciated.​

Answers

Answer:

The input is -6, hope this helps :D

Step-by-step explanation:

Represent the machines as expressions:

outputA= 7x-6

outputB= 3x+2

Find the input when the outputA is 3*outputB:

outputA=3outputB

(7x-6)=3(3x+2)

7x-6=9x+6

2x=-12

x=-6

Answer:

[tex]x=-6[/tex]

Step-by-step explanation:

[tex]A=7x-6\\B=3x+2\\For A=3B\\7x-6=3(3x+2)\\7x-6=9x+6\\2x=-12\\x=-6\\[/tex]

The difference of the highest and lowest observation is called.​

Answers

Answer:

Range

Step-by-step explanation:

The difference of the highest and lowest observation is called Range.

HL criteria of congruence can be used only with?

Answers

Answer: Right triangles or a hypotenuse and a leg

The two triangles shown are similar. Which of the following is an acceptable similarity statement for the triangles?
Question options:

A)

ΔSQR ∼ ΔVUT

B)

ΔQSR ∼ ΔVUT

C)

ΔSRQ ∼ ΔVUT

D)

ΔRQS ∼ ΔVUT

Answers

Answer:

I think of A

Step-by-step explanation:

is that right

Answer:

ΔSRQ ∼ ΔVUT

Step-by-step explanation:

i got it correct

what is the answer :(

Answers

Answer:

70 inches

Step-by-step explanation:

10 in x 7 in =70 inches

MARK ME BRAINLIEST!!!!!!!!!!

1. Find the unit rate per sandwich. Round to the
nearest hundredth if necessary: $210 for 50
sandwiches.

Answers

$4.2 because $210 dived by 59 is 4.2

Answer:

$4.20

Step-by-step explanation:

You take 210 and divide it by 50 and then it equals out to $4.20. Hope this helps! <3

If a(x) = 3x + 1 and b(x)= VX-4, what is the domain of (bºa)(x)?
0 (-0,00)
0 (0.00)
O [1,00)
O [4,00)

Answers

The domain of [tex]b\,\circ \,a\,(x)[/tex] is [tex][1, +\infty)[/tex].

How to apply composition between functions

The composition of two functions consists in replacing the variable of the former function ([tex]b(x)[/tex]) by the latter function ([tex]a(x)[/tex]). If we know that [tex]b(x) = \sqrt{x-4}[/tex] and [tex]a(x) = 3\cdot x +1[/tex], then the composite function:

[tex]b\,\circ\,a \,(x) = \sqrt{(3\cdot x+1)-4}[/tex]

[tex]b\,\circ\,a\,(x) = \sqrt{3\cdot x-3}[/tex]   (1)

Since the composite function is a square root function, then the domain fulfill the following inequation:

[tex]3\cdot x -3 \ge 0[/tex]

[tex]x \ge 1[/tex]

Hence, the domain of [tex]b\,\circ \,a\,(x)[/tex] is [tex][1, +\infty)[/tex]. [tex]\blacksquare[/tex]

To learn more on functions, we kindly invite to check this verified question: https://brainly.com/question/5245372

can someone please help

Answers

I believe b good luck !!

9514 1404 393

Answer:

  C.  √15 units

Step-by-step explanation:

The Pythagorean theorem tells you of the relationship between the sides and diagonal of the rectangle:

  8² = 7² +?²

  64 = 49 + ?²

  15 = ?² . . . . . .subtract 49

  ? = √15 . . . . . take square roots

A die is rolled. The set of equally likely outcomes is {1, 2, 3, 4, 5, 6}. Find the probability of getting a 9.

Answers

Answer:

you are only rolling 1 dice the probability of getting 9 is 0 there are only 6 sides to one die

Probability of getting a 9 is 0

Give that;

Total number of outcome in die = 6

Total numbers are {1, 2, 3, 4, 5, 6}

Find:

Probability of getting a 9

Computation:

Number of outcome 9 come in a die = 0

So,

[tex]Probability = \frac{Number\ of\ favourable\ outcomes}{Total\ outcomes}[/tex]

Probability of getting a 9 = 0 / 6

Probability of getting a 9 = 0

Learn more:

https://brainly.com/question/23044118?referrer=searchResults

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