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Naya [18.7K]
3 years ago
13

Solve x+1>10, x+11>20, and x+21>30

Mathematics
2 answers:
barxatty [35]3 years ago
7 0
X+1>10
x>10-1
x>9

x+11>20
x>20-11
x>9

x+21>30
x>30-21
x>9

\framebox[1.1\width]{Godspeed!} \par

Nesterboy [21]3 years ago
5 0
a)  \\  x+1>10 \\ x>10-1  \\ x>9 \\  \\  \\ b) \\  x+11>20 \\ x>20-11 \\ x>9 \\  \\ \\  c) \\ x+21>30 \\ x>30-21 \\ x>9 \\  \\  \\ \framebox[1.1\width]{Good Luck !} \par
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What is 2 times 4 plus 20 and times 3?
Gennadij [26K]

Answer:

84

Step-by-step explanation:

5 0
3 years ago
Which expression is equivalent to -4/7 - 8/9 + 4/7 - 9/8
olya-2409 [2.1K]

Answer:

<em>I misunderstood the question before, but here are two expressions equivalent to -4/7 - 8/9 + 4/7 - 9/8. </em>

71/72 + 70/72 +4/72

-1/7 - 3/7 - 5/9 - 3/9 + 2/7 +2/7 - 4/8 - 5/8

<em>Solved: -2 1/72</em>

Step-by-step explanation:

I could simply take the answer you get when combining all of the fractions, and I can make a new expression out of it. For example, I could use: 71/72+ 70/72+4/72. Or I could break apart all of the original fractions into smaller fractions. Example: -1/7 - 3/7 - 5/9 - 3/9 + 2/7 +2/7 - 4/8 - 5/8.

<em>To solve: Start by combining -4/7 and 4/7 to make 0, shortening your equation. Then continue by making the fractions remaining, 8/9 and -9/8, have a common denominator. To do this, we multiply -8/9 by 8, and -9/8 by 9. Then, we have -64/72 and -81/72. Then, we can combine the numerators of the fractions, as they have common denominators, and we get the fraction -145/72. We can then simplify this to -2 1/72.</em>

<em>Hope this helps!</em>

5 0
2 years ago
Find the difference of 8xand twice the sum of x and 7.
Anna11 [10]

Answer -

8x - (sum of x and 7)

= 8x - (x + 7)

= 8x - x - 7

= 7x - 7

= 7(x - 1)

3 0
2 years ago
Help please. I don’t understand and my teacher didn’t bother to teach us any of this and my brain hurts!!!!
const2013 [10]

Answer:

  23.  42 m^2

  24.  144 ft^2

  25.  68 cm^2

Step-by-step explanation:

The teacher should not need to spend any time teaching this. The area of the total figure is the sum of the areas of its parts. You already know that. And, you already know how to compute the areas of triangles and rectangles.

__

You may recall that the area of a triangle is ...

  A = 1/2bh

and the area of a rectangle with the same base and height is ...

  A = bh

So, a triangle with base b and height h has the same area as a rectangle with the same base (b) and half the height (h/2). Recognizing this makes these problems really simple.

__

23. The base of the rectangle and triangle is 7 m. The height of the triangle is 4 m, so its area is equivalent to adding 4/2 = 2 m to the 4 m height of the rectangle. Then the total area is ...

  A = (7 m)(4 m +(1/2)(4 m)) = (7 m)(6 m) = 42 m^2

__

24. Since there are two identical triangles of height 5, their total area is equal to that of a rectangle of height 5.

  A = (12 ft)(7 ft +5 ft) = 144 ft^2

__

25. The 5 cm height of the triangle makes it have an area equivalent to a rectangle 5/2 cm high.

  A = (8 cm)(6 cm +5/2 cm) = 68 cm^2

Note: we have read the fuzzy numbers as 8 cm wide, 6 cm high for the rectangle, and 5 cm high for the triangle. If your figure is different, please use the appropriate numbers in the calculation.

8 0
3 years ago
Find the coordinates of M, the midpoint of A and B where A has the coordinates (-2,6) and B has coordinates (4,9)
irina1246 [14]

Answer:

(1,7.5)

Step-by-step explanation:

(x₁ + x₂ / 2 , y₁ + y₂ / 2)

(-2 + 4 / 2 , 6 + 9 / 2)

(2 / 2 , 15 / 2)

(1,7.5)

3 0
3 years ago
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