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
Cerrena [4.2K]
3 years ago
8

(-3x)²-(3x-2)²-6*(2x-1.5)

Mathematics
1 answer:
Ilya [14]3 years ago
4 0
Without the instructions, I can only assume that you are to "expand the given expression."

Following order of operations rules requires that (3x-2)^2 and -6(2x-1.5) be evaluated first.

(3x-2)^2 = 9x^2 - 12x + 4   and    -6(2x-1.5) = -12x + 9

Then we have 9x^2 - (9x^2 - 12x + 4) -12x + 9

the 9x^2 terms cancel, leaving  us with 12x - 4 - 12x + 9 = 5 (answer)

You might be interested in
You are visiting a rainforest, but unfortunately,your insect repellent has run out. As a result, at each second, a mosquito land
zmey [24]

Answer:

Step-by-step explanation:

Prob at each second, a mosquito lands on your neck =0.5

Prob it bites/it lands = 0.2

Prob it does not bite/it lands = 0.8

Hence in one second prob for getting a bite = 0.5(0.2) = 0.01

i.e. 1/100 chance of getting bitten in one second

In 100 seconds number of bites =1

Expected time between successive bites = 100

6 0
3 years ago
Design a poster<br> DESIGN A POSTER TO<br> SHOW HOW TO COMPARE<br> AND ORDER DECIMALS.
Westkost [7]

Answer:

but how do you want it done?

Step-by-step explanation:

5 0
1 year ago
A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW.
jasenka [17]

Answer:

Net power = 20kW

B.) $128

Step-by-step explanation:

Given that :

Coefficient of performance = 2.5

Rate = 20kW

The net power required to operate the heat pump :

Energy delivery rate / Coefficient of performance

= 20kW / 2.5

= 8kW

B.) Given that electricity cost equals $0.08 per kW

If pump operates for 200 hours

Total energy used in kWhr :

8kW * 200= 1600kW

Cost per kW = $0.08

1600 * 0.08 = $128

3 0
2 years ago
Kenya bought 28 beads and nancy bought 25 beads. It takes 35 beads to make a necklace. Write and solve two addition equations to
JulijaS [17]
Kenya: 28+7=35. She will need 7 more beads.

Nancy: 25+10=35. She will need 10 more beads.
3 0
3 years ago
Jeanette has a monthly mortgage payment of $950. Her annual property taxes are $1300, her PMI is $65/month, and her homeowners i
LUCKY_DIMON [66]

Answer:

D) $1193.33

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Which graph represents the solution set of the system of inequalities?
    5·2 answers
  • I need help please!!!!??
    9·1 answer
  • How many inches will it be 54in by 42in
    10·1 answer
  • 10 dollars less than Caitlin
    5·1 answer
  • Draw a number line to divide 70÷5
    8·1 answer
  • Which piecewise relation defines a function?
    11·2 answers
  • What do you add to 2/9 to make 1?
    8·1 answer
  • The average January surface water temperatures (°C) of Lake Michigan from 2000 to 2009 were 5.07, 3.57, 5.32, 3.19, 3.49, 4.25,
    5·2 answers
  • hannah went to the sporting goods store and spent $75.15 of 6 items .5 of those items were pairs of socks and each cost the same
    9·1 answer
  • What is the variable and inequality to this question
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!