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
saveliy_v [14]
4 years ago
5

Can u guys PLEASE answer question g. THIS IS URGENT

Mathematics
2 answers:
ivann1987 [24]4 years ago
7 0

Answer:

Laura is 8

Step-by-step explanation:

let Laura's age now be x then Daniel's age is 2x

4years ago

Laura was x - 4 and Daniel 2x - 4, thus

2x - 4 = 3(x - 4) ← 3 times Laura's age

2x - 4 = 3x - 12 ( subtract 2x from both sides )

- 4 = x - 12 ( add 12 to both sides )

8 = x

Thus Laura is 8 years old

allsm [11]4 years ago
7 0

Answer:

8 years

Step-by-step explanation:

Daniel's current age: D

Laura's current age: L

D = 2L (1)

D - 4 = 3(L - 4) (2)

(2) D - 4 = 3L - 12

D = 3L - 8

(1) 3L - 8 = 2L

L = 8

You might be interested in
Find the seventh term of the following sequence 2,6,18, and 54
enot [183]
This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by <span>33</span> gives the next term. In other words, <span><span><span>an</span>=<span>a1</span>⋅<span>r<span>n−1</span></span></span><span><span>an</span>=<span>a1</span>⋅<span>r<span>n-1</span></span></span></span><span>.</span>
8 0
3 years ago
Yunuss earns $17.00 per hour as a lab tech. and gets time and a half for overtime for any hours over 40. Last week he worked 46.
Gwar [14]

Answer:

Step-by-step explanation:

C is correct answer

17*40+17*1.5*6.25=839.38

7 0
3 years ago
The American Veterinary Association claims that the annual cost of medical care for dogs averages $100 with a standard deviation
Taya2010 [7]

Answer:

The probability that the cost for someone's dog is higher than for the cat is 33.2%.

Step-by-step explanation:

With the data given, we know that the difference in cost of medical care of dogs and cats have a normal distribution with μ=-20 and σ=46.

To know the probability of the cost for the dog is higher than the cat, we have to calculate the probability of P(d>0).

Then we have to calculate z, and look up in a standarized normal distribution table.

Calculate z:

z=\frac{X-\mu}{\sigma}=\frac{0-(-20)}{46}=\frac{20}{46}=   0.4348

The probability of the difference being higher than 0, we have:

P(d>0)=P(z>0.4348)=0.33185

We can say that the probability that the cost for someone's dog is higher than for the cat is 33.2%.

8 0
3 years ago
The researcher is interested to know if policy A (new) is more effective than policy B (old). Frame the hypothesis and describe
vesna_86 [32]

<u>Answer:</u>

<u>Null hypothesis: Policy B remains more effective than policy A.</u>

<u>Alternate hypothesis: Policy A is more effective than policy B.</u>

<u>Step-by-step explanation:</u>

Remember, a hypothesis is a  usually tentative (temporary until tested) assumption about two variables– independent and the dependent variable.

We have two types of hypothesis errors:

1. A type I error occurs when the null hypothesis (H0) is wrongly rejected.

That is, rejecting the assumption that policy B remains more effective than policy A when it is <em>actually true.</em>

2. A type II error occurs when the null hypothesis H0, is not rejected when it is actually false. That is, accepting the assumption that policy B remains more effective than policy A when it is <em>actually false.</em>

3 0
3 years ago
A board is 12 feet long. if the board is divided into 12 equal sections, how long is each section? 1 foot 6 inches
FrozenT [24]
I believe the answer is 1 foot.
Because 12 divided by 12 = 1
Hope this helps! :-)
P.S. please make sure to have all the options!
5 0
3 years ago
Other questions:
  • Write an inequality for the situation: Tom was allowed to spent up to and including $15. Let m be the amount of money Tom could
    15·1 answer
  • What is the product (9t-4)(-9t<br> -4)
    9·2 answers
  • Eric made a drawing of his rectangular bedroom with the scale 1 inch=3 feet. The drawing was 5 inches long 4 inches wide. What w
    10·1 answer
  • Andrea borrowed 2,240 at 15% apr for 18 months. how much interest will she pay?is the answer $336
    12·2 answers
  • If 5 is an element in the domain of
    11·1 answer
  • Write this number in scientific notation 38200000 <br> Look at attachment down below
    15·2 answers
  • You have less than three hours to finish your
    8·1 answer
  • Which statements about special quadrilaterals are true? Select all that apply.
    14·2 answers
  • What is the center and radius of the circle?
    14·1 answer
  • Sheena needs 1 3/4 cups of sugar to make pancakes. she already has 5/8 cups of sugar. how much more does she need?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!