1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
oksano4ka [1.4K]
3 years ago
12

PLEASE PLEASE HELP THANKS SO MUCH

Mathematics
2 answers:
yawa3891 [41]3 years ago
7 0

Answer:

a=12

b=9

Step-by-step explanation:

b=0.75a

a+b=21

a+0.75a=21

1.75a=21

a=12

a+b=21

12+b=21

b=9

ruslelena [56]3 years ago
5 0

Answer:

a= 12

b= 9

I hope this helps

You might be interested in
Jane has her height measured using a metric ruler as 1.6 meters. She would like to know her height in inches. She knows that the
slavikrds [6]

Answer:

Jane's height is <u>63 inches</u>.

Step-by-step explanation:

Given:

Jane has her height measured using a metric ruler as 1.6 meters. She would like to know her height in inches. She knows that there are 100 centimeters in a meter and 2.54 centimeters in an inch.

Now, to find jane's height to the nearest inch.

The height of Jane measured using metric ruler = 1.6 meters.

As, 1 meter = 100 centimeters.

So, by using conversion factor we convert the height of Jane into centimeters from meters:

1.6\ meter=1.6\times 100

               =160\ centimeters.

<em>Height of Jane in centimeters = 160.</em>

As given, 2.54 centimeters in an inch.

Now, we convert the centimeters by using unitary method:

If, 2.54 centimeters = 1 inch.

Then, 1 centimeters =  \frac{1}{2.54} \ inch

So, 160 centimeters = \frac{1}{2.54}\times 160

=\frac{160}{2.54}

=62.99\ inches.

<em>Thus, the height nearest to inch = 63 inches.</em>

Therefore, Jane's height is 63 inches.

4 0
3 years ago
HELP PLEASE THANK YOU
nataly862011 [7]

Answer:

1 = 180 - 102 = 78

Step-by-step explanation:

sorry if I'm wrong

7 0
3 years ago
At the first school , there were 5 Sixth graders for every 2 seventh graders. At the second school dance, there were 7 sixth gra
rjkz [21]

Answer:

No

Step-by-step explanation:

The ratio of the first school is 5/2. The ratio of the second school is 7/8.

3 0
2 years ago
I will make someone the BRAINLLYEST <br><br>what is this and i will
diamong [38]

Answer:

  1. 42 (d)
  2. 105 (i)
4 0
3 years ago
Let P(x) be the statement "x is a clear explanation," ????(x) be the statement "x is satisfactory," ????(x) be the statement "x
Flauer [41]

Answer:

a P(x) = Q(x)

b. R(x) = Q(x)

c. R(x)  = P(x)

d. Yes

Step-by-step explanation:

This is a statement of logical connectives.

a P(x) = Q(x)

b. R(x) = Q(x)

c. R(x)  = P(x)

d. Yes, (c) follows from (a) and (b)

Reasoning:

(c) is equivalent to ∀x ¬ P(x) ∨ Q(x)

Proof:

Follow the tautology (X→Υ) Ξ(¬x∨Υ)

This gives X: R(x) ∧ ¬ P(X)

7 0
4 years ago
Other questions:
  • An electrician bought 80 feet of electrical wire and used 55 feet of it. What percent of the wire went unused?
    9·1 answer
  • The ages of the winners of a cycling tournament are approximately bell-shaped. The mean age is 28.7 years, with a standard devia
    6·1 answer
  • What is the solution to the inequality? 5t≤−15
    7·2 answers
  • In the figure below, angle y and angle x form vertical angles. Angle x forms a straight line with the 50° angle and the 40° angl
    14·1 answer
  • 18. Triangle CAT is located at C (-2, 2), A (4, -2), T (1, 1). Find the coordinates of its image after a dilation with a scale f
    10·1 answer
  • 4. k/6 = 8/16 5. 5.4/7 = 27/h 6. 8/11 = 4/y+2
    13·1 answer
  • Two triangular faces of a rectangular pyramid each have an area of 7.8 cm and the other two faces each have an area of 16.5
    9·2 answers
  • Help please!!!!!!!!!!!
    12·1 answer
  • I need help with this
    13·1 answer
  • 50 POINTS+BRAINLIEST!!!!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!