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kakasveta [241]
3 years ago
12

Solve each quadratic equation. 4x²=100

Mathematics
2 answers:
liraira [26]3 years ago
6 0
4x^2=100
Square root 4x^2=square root 100
4x=plus or minus 10
4x/4=plus or minus 10/4
X= -2.5, x= 2.5
ankoles [38]3 years ago
3 0
X=100/4
x=25
the square root of 25 is 5
that means x=5
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I really need this help
IRISSAK [1]

Answer:

area: 454.2 sq.cm

perimeter: 77.7 cm

Step-by-step explanation:

to find area, find the area of all the separate shapes and add them together:

semi-circle:

radius is 12 cm

area = \frac{\pi (12)^2\\}{2} = 226.2 sq.cm

separate the trapezoid into two right triangles and a rectangle.

area for triangles:

\frac{1}{2}(5)(12) = 30

30 x 2 = 60 sq.cm (since there are two triangles)

area for rectangle:

12 x 14 = 168 sq.cm

area of whole shape: 226.2 + 60 + 168 = 454.2 sq.cm

for perimeter, just add the length of the exterior sides together.

we have some unknown sides, such as the semicircle and the sides of the trapezoid

we can find the hypotenuse of the triangles we used earlier to find the sides of the trapezoid with pythagorean theorem

5^2 + 12^2 = c^2

25 + 144 = c^2

169 = c^2

\sqrt{169} =\sqrt{c^2}

c = 13 cm

to find the outside perimeter of the semi-circle, solve as if you were finding the circumference of a normal circle and divide it in half

\frac{2\pi12}{2} = 37.7 cm

now add it all up:

14 + 13 + 13 +37.7 = 77.7

3 0
3 years ago
Help!!<br><br>Will give brainliest!<br><br>Plz explain how to do this if possible.
Dima020 [189]

Answer: a=3.74

Step-by-step explanation:

first use 15 to solve for  x and z. x=7.5 and z=12.99 or 13. Once you know x you can use that to solve for y and a. y=6.5 and x=7.5 and using pythagorean theorem you will find that a= the square root of 14 or 3.74.

4 0
3 years ago
Read 2 more answers
400 ml of squash is made by mixing 50 ml of cordial with water. What fraction of the drink is water?
avanturin [10]

Answer:

Fraction of drink that is water = = 0.875 = 87.5 %

Explanation:

 400 ml of squash is made by mixing 50 ml of cordial with water.

 Total volume of squash = 400 ml

   Total volume of cordial = 50 ml

   Total volume of water  =  400 - 50 = 350 ml

    Fraction of drink that is water = Volume of water/ Volume of squash

                                                     = 350/400

                                                     = 7/8

                                                     = 0.875 = 87.5 %


 

   

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Organic Designs is a small, successful chain of stores offering stylish clothes made of all-organic materials for infants, toddl
Leviafan [203]

Answer:

The correct option is;

C. catalog marketing

Step-by-step explanation:

From the question, Organic designs company size = Small

Organic Designs business line = Chain store with many items

Organic Design objective = Reaching potential customers with direct marketing

Customer target of marketing campaign = Distant customers

Company long run objective is to build relationship with customers

Based on the above requirements, the catalog marketing technique is the most appropriate as it  offers opportunity to sell a host of items on a platform with the ideology of an online store  to distant customers who can then access items sold at Organic Designs stores through the catalog.

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The general equation of the line is 3x−2y−4
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