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
Nadya [2.5K]
4 years ago
10

Math questions need help

Mathematics
1 answer:
Alchen [17]4 years ago
5 0
14.   -0.44

15.   26.488


16.   -3.33333333333

17. <span>-5.14285714286

18. -0.12

19. Eleven 2.25 pound containers</span>
20. (a)19        (b)7.6

21.Its less than.The reason is because different seasons have different rainfall amounts.
You might be interested in
What is the sum of the interior angles of the polygon shown below?
34kurt

Answer:

900

Step-by-step explanation:

Sum of interior angle for a polygon = (n-2)180

7 sides

=(7-2)180

=5*180

=900

8 0
4 years ago
How to graph y=|x-4| -3
dsp73

Take the value of x-4, and make it positive, then subtract three.  The graph would look like the following.



5 0
4 years ago
if motorist drove a distance of 90km at constant speed for the first 40km and then drove 30 km/hr faster for the rest of the jou
elena55 [62]

Answer:

Step-by-step explanation:

The motorist drove at a distance of 90km at a constant speed for the first 40km, and then 20 km/hr faster for the rest of the journey.

The whole journey took him 1hr.

Let S denotes the average speed (in km/hr) for the first 40 km.

Hence we get the following relation,

40/S + (90 - 40)/(S + 20) = 1

or 50/(S + 20) = 1 - 40/S = (S - 40)/S

or (S + 20)(S - 40) = 50S or S^2 - 70S - 800 = 0 or (S - 80)(S + 10) = 0

or S = 80 (km/hr) [Ans]

[S cannot be negative value]

3 0
3 years ago
Evaluate (64^-1/2)^-2/3
Ira Lisetskai [31]

Answer:

4

Step-by-step explanation:

We'll do two things here.  First remember that when a number is raised to an exponent, and the result is raised to another exponent, you can simply multiply those exponents and apply them to the base.  So we can multiply -1/2 and -2/3, giving us 1/3, which is what we'll raise 64 to.

The other thing to remember is that a fractional exponent is the same as a root of that base.  So raising a number to the power of 1/3 just means we want the cube root of that number.

Applying those and we get:

(64^{-\frac{1}{2}})^{-\frac{2}{3}}\\= 64^{(-\frac{1}{2} \times -\frac{2}{3})}\\= 64^{\frac{1}{3}}\\= 4

6 0
3 years ago
Nidhi is thinking of a number n, and she wants her sister to guess the number. Her first clue is that eight less than three time
Dmitriy789 [7]

Answer:

The range of numbers that Nidhi might be thinking of is between 3 and 9.

Step-by-step explanation:

We are given that Nidhi is thinking of a number n, and she wants her sister to guess the number.

Her first clue is that eight less than three times her number is between one and nineteen.

Let the number Nidhi is thinking be 'n'.

So, eight less than three times her number means that;

(3\times \text{n}) - 8 = 3\text{n}-8

Now, according to the question; the above equation is between one and nineteen, so;

1<  3\text{n}-8 < 19

Adding 8 to the whole expression;

1+8<  3\text{n}-8 +8< 19+8

9<  3\text{n}< 27

Dividing the whole expression by 3;

\frac{9}{3} <  \frac{3\text{n}}{3} < \frac{27}{3}

3<  \text{n}< 9

Hence, the range of numbers that Nidhi might be thinking of is between 3 and 9.

3 0
3 years ago
Other questions:
  • Tony's calculator correctly shows 3.4 x 0.5=1.7. Explain why the number of decimal places in the product is not the same as the
    8·2 answers
  • A school knows that 11% of its students are left-handed. What is the probability that there will be between 33 and 45 left-hande
    14·1 answer
  • What is the end behavior of h (x) = StartFraction negative 5 x Superscript 4 Baseline + 13 x Over x cubed EndFraction As x appro
    7·2 answers
  • Pls help answer the questions
    6·2 answers
  • PLS ANSWER!!!!!!!!!!!! Mrs. Cardona has 23 of a pan of lasagna left. She wants to divide it into 6 equal pieces for her family.
    13·2 answers
  • Dara owns a small clothing store. She decides to give two employees, Sam and Tanya, a same-percentage raise. Sam currently earns
    15·1 answer
  • What is the difference between the most popular subject and the least popular subject ?? ​
    9·1 answer
  • Two six sided dice are rolled and the two dice equals 7. what is the probability that one die is a 3
    6·1 answer
  • Data management probability
    15·1 answer
  • a cylindrical tank has a volume of 100 gallons. a similar tank next to it has dimensions that are 2 times as large. what is the
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!