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
posledela
3 years ago
8

8x+9y=60 2x-9y=-30 elimation method

Mathematics
1 answer:
OLEGan [10]3 years ago
8 0

Answer:

x=3 y=4

Step-by-step explanation:

8x+9y=60 + 2x-9y=-30

10x=30

x=3

y=4

You might be interested in
Let me know if you can answer these :)
Olegator [25]

Answer:

10. 285

11. 6\frac{3}{4}

16.a. Stiles Family

<u>Reason</u>-The Styles family uses  twice as much as the other two, because the electric consumption per person (which is =745 KWh) is much higher than the other two.

16.b. Mendelez family

Reason-The Mendelez family uses the least amount of water, because the water usage  per person (which is =875 gallons) is much lower than the other two.

Step-by-step explanation:

10. In 6 mins, no. of machine parts produced = 114

in 1 min, no. of machine parts produced = 114/6

in 15 min, no. of machine parts produces  \frac{114 *15}{6}\\=285

---------------------------------------------------------------------------------------------------------

11. To make 8 jumbo muffins take, amount of baking powder used = 1\frac{1}{2} =\frac{3}{2}

To make 1 jumbo muffin, amount of baking powder used = \frac{3}{2} / 8 =3/16

To make 3 dozens = (3 * 12 )= 36 muffins, amount of baking powder used =  36 *3/16

=\frac{27}{4} =6\frac{3}{4}

-------------------------------------------------------------------------------------------------------------

16. a. Electricity consumed by 1 person in the Mendelez family :

=1560/4

=390 KWh

Electricity consumed by 1 person in the Barton family:

=2130/6

=355 KWh

Electricity consumed by 1 person in the Styles Family:

=1490/2

=745 KWh

The Styles family uses  twice as much as the other two, because the electric consumption by 1 person is much higher than the other two.

------------------------------------------------------------------------------------------------------------

16.b. Water consumed by 1 person in the  Mendelez family = 3500/4=875 gallons

Water consumed by 1 person in the Barton family = 6400/6=1050 gallons

Water consumed by 1 person in the Styles family =2500/2=1250 gallons

5 0
3 years ago
On a line segment, C is between B and D. If BC = 3.6 and BD = 8.4, what is CD?
atroni [7]

Answer:

4.8

Step-by-step explanation:

b to c is 3.6

b to d is 8.4

if c is in the middle , you would subtract 8.4 and 3.6

5 0
3 years ago
Plzzzz Help
Yuliya22 [10]

a. true

b. false ( angles should equal 180 125+65=190)

c. true

d. true

e. true

7 0
3 years ago
Read 2 more answers
Throw a dice randomly. Out of 10 times throwing, the 1 dot side shows up everytime. What are the chances of having the 1 dot sid
Evgen [1.6K]
The dice has i think about 10-11 time chance since it landed 10 times in a row already and not 11

4 0
3 years ago
Wat is the domain of g(x)
scoundrel [369]

Answer:

The first choice is the answer of course

3 0
3 years ago
Other questions:
  • A network charges $855,000 for a 30-second ad during a major televised sports event. The advertisers must purchase a minimum of
    5·1 answer
  • There are 90 students in 5th Grade. 10% of them were absent today. How many students were present .
    10·1 answer
  • Which is the simplified form of the expression (6 to the power of -2 times 6 to the power of 5) to the -3rd power?
    7·2 answers
  • Which two teachers received equivalent ratios of apples from their total number
    10·2 answers
  • 3/ [(5)^(1/2) – (3)^(1/2)] simpfily
    13·1 answer
  • A medical company tested a new drug on 100 people for possible side
    7·1 answer
  • Please help I’ll mark you as brainliest if correct
    12·1 answer
  • For which of the following conditions is it not appropriate to assume that the sampling distribution of the sample mean is appro
    10·1 answer
  • 304,056 trying to represent the value of this number using expanded notation we give the answer but is giving us an error so we
    8·1 answer
  • Ayo where t f is mario judah
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!