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
Mrac [35]
2 years ago
9

Please help! Will mark brainliest!

Mathematics
1 answer:
Anna71 [15]2 years ago
6 0
8/100 = x/175
cross multiply
(100)(x) = (8)(175)
100x = 1400
x = 1400/100
x = 14.....so 14 vials will treat 175 people
You might be interested in
Please don't answer wrong.​
Tamiku [17]

Answer:

<h3><u>Part (a)</u></h3>

<u />

<u>Equation of a circle</u>

(x-a)^2+(y-b)^2=r^2

where:

  • (a, b) is the center
  • r is the radius

Given equation:  x^2+y^2=6.25

Comparing the given equation with the general equation of a circle, the given equation is a <u>circle</u> with:

  • center = (0, 0)
  • radius = \sqrt{6.25}=2.5

To draw the circle, place the point of a compass on the origin. Make the width of the compass 2.5 units, then draw a circle about the origin.

<h3><u>Part (b)</u></h3>

Given equation:  x+y=1.5

Rearrange the given equation to make y the subject:  y=-x+1.5

Find two points on the line:

x=-2 \implies -(-2)+1.5=3.5\implies (-2,3.5)

x=2 \implies -(2)+1.5\implies-0.5\implies (2,-0.5)

Plot the found points and draw a straight line through them.

The <u>points of intersection</u> of the circle and the straight line are the solutions to the equation.

To solve this algebraically, substitute  y=-x+1.5  into the equation of the circle to create a quadratic:

\implies x^2+(-x+1.5)^2=6.25

\implies x^2+x^2-3x+2.25=6.25

\implies 2x^2-3x-4=0

Now use the quadratic formula to solve for x:

x=\dfrac{-b \pm \sqrt{b^2-4ac} }{2a}\quad\textsf{when }\:ax^2+bx+c=0

\implies x=\dfrac{-(-3) \pm \sqrt{(-3)^2-4(2)(-4)}}{2(2)}

\implies x=\dfrac{3 \pm \sqrt{41}}{4}

To find the coordinates of the points of intersection, substitute the found values of x into y=-x+1.5

\implies y=-\left(\dfrac{3 + \sqrt{41}}{4}\right)+1.5=\dfrac{3-\sqrt{41}}{4}

\implies y=-\left(\dfrac{3 - \sqrt{41}}{4}\right)+1.5=\dfrac{3+\sqrt{41}}{4}

Therefore, the two points of intersection are:

\left(\dfrac{3 + \sqrt{41}}{4},\dfrac{3-\sqrt{41}}{4}\right) \textsf{ and }\left(\dfrac{3 - \sqrt{41}}{4},\dfrac{3+\sqrt{41}}{4}\right)

Or as decimals to 2 d.p.:

(2.35, -0.85) and (-0.85, 2.35)

6 0
2 years ago
Multiply 12x2y4z(-4x3y6z2)
mariarad [96]

Answer:

-48x^5 y^{10} z^3 should be the answer

Step-by-step explanation:

4 0
2 years ago
I need help figuring out what a and b are
7nadin3 [17]

Answer:

A=4 B=100

Step-by-step explanation:

5+0.4 (4/10)= 5.4

5.4+0.08(8/100)=5.48

7 0
3 years ago
Which equation has a constant of proportionality equal to 0.25
laila [671]

Answer: y = 1/4x

Step-by-step explanation:

If the constant of proportionality is K, then:

y = kr

In which equation do we multiply x by 0.25 to get y?

1/4 = 0.25

5 0
3 years ago
As an estimation we are told £3 is 4 euro.Convert £13.50 to euros
bixtya [17]

Answer:

15.07 Euro

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • The volume of a rectangular prism with a square base can be written as V = s² x h where V is the volume, s is one side of the sq
    9·1 answer
  • In music, a quaver is one-eighth of a semibreve (whole note). What fraction of a semibreve is a hemidemisemiquaver? (Hint: hemi-
    8·1 answer
  • Which is equal to 7 hectometers? 0.7 kilometers 0.07 kilometers 0.007 kilometers
    14·2 answers
  • My question is what is 4-5h how do you solve this problem
    14·2 answers
  • Kamesh and Pablo each read 40 books in one year. Kamesh read 12 nonfiction books. Thirty five percent of the books Pablo read we
    13·1 answer
  • I NEED HELP ASAP
    10·2 answers
  • Adelphi is 34.3 miles east of sterling. The distance between Adelphi and sterling is
    14·2 answers
  • The perimeter of the garden <br>The area of the garden​
    7·1 answer
  • identify the correct order pairs made by using the correct bonding terms of these two sequences the sequence 1 terms for sequenc
    15·1 answer
  • What is the area of a circle whose radius is 4 ft?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!