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Harlamova29_29 [7]
3 years ago
12

Please help serious answers only

Mathematics
2 answers:
pishuonlain [190]3 years ago
6 0
90-7x3

90-21=69

Ther you go have a great day
jonny [76]3 years ago
5 0

Answer:

69

Step-by-step explanation:

We are given the expression:

\displaystyle \large{10y - 7z}

Evaluate the expression when y = 9 and z = 3; substitute y = 9 and z = 3 in the expression.

\displaystyle \large{10(9)- 7(3)} \\  \displaystyle \large{90- 21} \\  \displaystyle \large{69}

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Number of plane surface in a matches box​
DanielleElmas [232]

Answer:

The answer is 6

Step-by-step explanation:

Same as plane surfaces on a regular cuboid

7 0
3 years ago
Who can help me with 17 and 18
nikklg [1K]

Answer:

correct statements in Q no. 17 are;

  • 0.1 < 0.125
  • 0.125 > 0.12

Answers for Q no. 18;

  • 4.19
  • 4.2

Step-by-step explanation:

8 0
2 years ago
What is the volume of a square prism that is 4 centimeters by 4 centimeters by 8 centimeters
My name is Ann [436]

Answer:

138 is the answer

Step-by-step explanation:

128 square

6 0
2 years ago
3-(x-1)=-1-(5-x) pls help
Alika [10]

Answer:

- 3(x - 1) =  - 1(5 - x) \\  \\ 3 - x + 1 =  - 5 + x \\  \\  - x - x =  - 5 - 3 - 1 \\  \\  - 2x =  - 5 - 3 - 1 \\  \\  - 2x =   - 9 \\  \\ x =  \frac{ - 9}{ - 2}  \\  \\ x = 4.5

3 0
3 years ago
What are the square roots of; (note: i think there are supposed to be 2 each) 36 12 1.96 0.64 400 25/36
Goryan [66]

Answer:

36 : 6 and -6

12 = 2\sqrt{3} ,  -2\sqrt{3}

1.96 =1.4 and -1.4

0.64 : 0.8 and -0.8

400 : 20 and -20

25/36 = 5/6 and -5/6

Step-by-step explanation:

we know that

(-x)^2 = x^2

ALSO

(x)^2 = x^2

thus, square of both negative and positive number is same positive number.

_________________________________________________

36 = 6*6

36 = -6*-6

hence

square roots of 36 is both -6 and 6

12 = 4*3 = 2^2*\sqrt{3} *\sqrt{3}

\sqrt{12} = 2\sqrt{3}

also

12 = -2\sqrt{3} *-2\sqrt{3}

\sqrt{12} = -2\sqrt{3}

___________________________________

1.96 = 196/100 = (14/10)^2

1.96 = 196/100 = (-14/10)^2

hence

\sqrt{1.96}  = 14/10  \ or -14/10

_______________________________

0.64 = 64/100 = (8/10)^2 = 0.8^2

0.64 = 64/100 = (-8/10)^2 = (-0.8)^2

Thus, square root of  0.64 = 0.8 and -0.8

_________________________________

400 = 20^2

400 = (-20)^2

\sqrt{400}  = 20\\\sqrt{400}  = -20\\

__________________________________

25/36 = (5/6)^2

25/36 = (-5/6)^2

\sqrt{ 25/36} = 5/6 \\\sqrt{ 25/36} = (-5/6

7 0
3 years ago
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