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
shtirl [24]
3 years ago
12

Please solve the underlined question thank you!

Mathematics
2 answers:
alexgriva [62]3 years ago
6 0

Answer:

Step-by-step explanation:

50x^2 - 72 = 0

2(25x^2 - 36) = 0

2(5x + 6)(5x - 6) = 0

5x + 6 =0; x = -6/5

5x - 6 = 0; x = 6/5

Answer

x = ± 6/5

----------------------

9x^2 + 6x = 10

Divide both sides by 9

x^2 + 2/3 x = 10/9

b/2 = 2/3 * 1/2 = 2/6 = 1/3

As you know (1/3)^2 = 1/9

so add both sides by 1/9

x^2 + 2/3 x + 1/9 = 10/9 + 1/9

(x + 1/3)^2 = 11/9

x + 1/3 = ±√11/9

x = ± √11 / 3  - 1/3

Answer:

x = ± √11 / 3  - 1/3

notsponge [240]3 years ago
5 0

Answer:

Step-by-step explanation:

4

Take out a 2 to begin with.

2(25x^2 - 36)    This is the difference of squares (inside the brackets). Factor.

2*(5x - 6)(5x + 6)

You might be interested in
5. Kayla is making a scale drawing of a room in a house. The room
marusya05 [52]

Answer:

he scale of a room in a blueprint is 3 in: 5 ft. A wall in the same blueprint is 18 in. ... 15. 20. 25. 30 à. How long is the actual wall? The wall is 30 feet lona. 1.5 in. b. A window in ... Redraw the rectangle on centimeter grid paper using a scale of 1 cmcom. I. leme ... measurements of the object of the drawing can you find?

Step-by-step explanation:

5 0
3 years ago
Please help me with question number 2
Mice21 [21]

Answer:

2. The area of the side walk is approximately 217 m²

3. The distance away from the sprinkler the water can spread is approximately 11 feet

4. The area of the rug is 49.6

Step-by-step explanation:

2. The dimensions of the flower bed and the sidewalks are;

The diameter of the flower bed = 20 meters

The width of the circular side walk, x = 3 meters

Therefore, the diameter of the outer edge of the side walk, D, is given as follows

D = d + 2·x (The width of the side walk is applied to both side of the circular diameter)

∴ D  = 20 + 2×3 = 26

The area of the side walk = The area of the sidewalk and the side walk = The area of the flower bed

∴ The area of the side walk, A = π·D²/4 - π·d²/4

∴ A = 3.14 × 26²/4 - 3.14 × 20²/4 = 216.66

By rounding to the nearest whole number, the area of the side walk, A ≈ 217 m²

3. Given that the area formed by the circular pattern, A = 379.94 ft.², we have;

Area of a circle = π·r²

∴ Where 'r' represents how far it can spread, we have;

π·r² = 379.94

r = √(379.94 ft.²/π) ≈ 10.997211 ft.

Therefore, the distance away from the sprinkler the water can spread, r ≈ 11 feet

4. The circumference of the rug = 24.8 meters

The circumference of a circle, C = 2·π·r

Where;

r = The radius of the circle

π = 3.1

∴ For the rug of radius 'r', C = 2·π·r = 24.8

r = 24.8/(2·π) = 12.4/π = 12.4/3.1 = 4

The area = π·r²

∴ The area of the rug = 3.1 × 4² = 49.6.

8 0
2 years ago
Which two operation are on the same level within the order of operations, meaning that neither has a preference over the other ?
MAXImum [283]

Answer:

Addition and Subtracttion

Step-by-step explanation:

The order of operations has to with a generally accepted order to follow when evaluating a mathematical expression.

PEDMAS or BODMAS is the order of operations to follow.

The two operations that are on the same level within the order of operations are addition and subtracttion

This means that, neither has a preference over the other.

6 0
3 years ago
You are running a fuel economy study. One of the cars you find is blue. It can travel 41 1/2 on 1 1/4 of gasoline. Another car i
kogti [31]

Answer: i  get point

Step-by-step explanation:

Blue car: 30.5 / 1.25 =24.4 miles per gallon

Red car: 25.6/0.80   =32 miles per gallon

You can easily see that the Red car travel farther on 1 gallon of gasoline.

7 0
3 years ago
Read 2 more answers
Find the value of y when x=7. y=____
yarga [219]

In this case, 7 is being added to the odometer which already reads 78. If you add 7 to 78, you get 85. Meaning y = 85!

3 0
2 years ago
Read 2 more answers
Other questions:
  • Whatis the circumference of a circle with a radius of 34
    14·2 answers
  • Circle J and circle K are shown in the diagram below.
    8·1 answer
  • (4 ten thousands 8 hundred) divided 10
    10·1 answer
  • A clothing store spends $10 for each shirt it produces and has fixed costs of $400. If the store makes 50 shirts, how much shoul
    14·1 answer
  • PLEASE HELP
    11·1 answer
  • Describe the relationship between the values of the digits in the number 9999999.
    12·1 answer
  • Use the quadratic formula to solve x2 + 8x + 9 = 0. Estimate irrational solutions to the nearest tenth.
    7·2 answers
  • Will the researcher reject the null​ hypothesis? A. Do not rejectDo not reject the null hypothesis because muμequals=35.135.1 mi
    13·1 answer
  • What Values of X Makes these equations true?<br><br> Label Them as <br> 1.<br> 2.
    8·2 answers
  • Two pentagons are similar. the area of one of the Pentagon is 9 times that the other. determine the ratio of the length of the c
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!