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
Volgvan
2 years ago
6

Evaluate the expression when x = 1/2 and y= – 2/5 x + y . ​

Mathematics
1 answer:
mash [69]2 years ago
6 0

9514 1404 393

Answer:

  1/10

Step-by-step explanation:

Put the values where the variables are and do the arithmetic.

  x + y = 1/2 +(-2/5) = 5/10 -4/10 = 1/10

You might be interested in
After completing a fraction division problem, Clarice used
Evgen [1.6K]

Answer:

Yes because She is incorrect 5 x 1 1/2 is 3 1/3

Step-by-step explanation:

Multiply 5 and 1 1/2 to get 3 1/3

5 0
3 years ago
Read 2 more answers
An article in Medicine and Science in Sports and Exercise ["Maximal Leg-Strength Training Improves Cycling Economy in Previously
Sholpan [36]

Answer:

[300.202 , 329.798]

Step-by-step explanation:

The 95% confidence interval is given by the interval

\large [\bar x-t^*\frac{s}{\sqrt n}, \bar x+t^*\frac{s}{\sqrt n}]

where

\large \bar x <em>is the sample mean  </em>

<em>s is the sample standard deviation  </em>

<em>n is the sample size (n = 7)  </em>

\large t^* is the 0.05 (5%) upper critical value for the Student's t-distribution with 6 degrees of freedom (sample size -1), which is <em>an approximation to the Normal distribution for small samples (n<30).</em>

Either by using a table or the computer, we find  

\large t^*= 2.447

and our 95% confidence interval is

\large [315-2.447*\frac{16}{\sqrt{7}}, 315+2.447*\frac{16}{\sqrt{7}}]=\boxed{[300.202,329.798]}

7 0
3 years ago
The radius of circle A is three feet less than twice the diameter of circle B. If the sun mmm of the diameters of both circles i
yanalaym [24]

Answer:

Area of Circle A = 1133.54

Circumference of Circle A= 119.32

Step-by-step explanation:

Given: Sum of both circle diameters= 49 feet.

           Circle A radius= Three feet less than twice the diameter of circle B.

Lets assume diameter of Circle B is "x"

∴ Circle A radius (r)= (2x-3)

We know, the diameter of circle is 2r

Diameter of Circle A is 2\times (2x-3)

Next as given sum of both circle diameter is 49 feet.

∴ 2(2x-3)+x= 49\ feet

distributing 2 with 2x and -3

⇒ 4x-6+x= 49

⇒5x-6= 49

Adding both side by 6

⇒5x=55

Cross multiplying both side.

⇒x=\frac{55}{5} = 11

∴ Diameter of circle B is 11 feet.

Next, subtituting the value of x to get the value of radius for Circle A.

Radius of circle A= (2x-3)

⇒ Radius of circle A= (2\times 11-3)= 22-3

∴ Radius of circle A= 19 feet.

Area of circle= \pi r^{2}

Taking π= 3.14

Area of circle A= 3.14\times 19^{2} = 3.14\times 361

∴ Area of circle A= 1133.54

Circumference of circle= 2πr

Circumference of Circle A= 2\times 3.14\times 19= 119.32

∴ Circumference of Circle A= 119.32

3 0
3 years ago
Read 2 more answers
The volume of the cube is equal to four times the area of one of its faces. What is the volume of the cube?.
kaheart [24]
Given:  V of cube = 4s^2, where s is the length of just one edge of the cube.
8 0
2 years ago
Read 2 more answers
A farmer needs to mix 12 ounces of fertilizer for every 10 pounds of soil. How many pounds of fertilizer will the farmer need to
9966 [12]
The answer is 9 
     12 ounces x --------------- = ---------------- 10 pounds of soil 120 pounds of soil Set the equation up as a proportion and solve for x: 10x = 1440 ---- ----- 10 10 x = 144 ounces The question asks for the answer in pounds, and 16 ounces = 1 pound. 144/16 = 9
5 0
2 years ago
Other questions:
  • A 16-inch candle is lit and burns at a constant rate of 0.8 inches per hour. Let t represent the number of hours since the candl
    10·1 answer
  • What is 7% of 40? Round to the nearest whole number if necessary.
    11·1 answer
  • Three high school football teams each played four games. The Wildcats scored 18, 10, 14, and 18 points. The Knights scored 13, 1
    13·1 answer
  • Which is equal to 5^4 • 5^8?
    7·1 answer
  • Kiara needs a container to put in her freezer.
    7·1 answer
  • What is the Area of this quadrilateral
    12·1 answer
  • Whats 1girl + 1 girl=
    15·2 answers
  • Will give brainlest
    8·1 answer
  • Order the set of numbers from least to greatest. {63, -34, 36, -27, -13, and 12} ​
    5·1 answer
  • HEY PEOPLE I NEED HELP ASAP I NEED TO SHOW WORK PLS HELP
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!