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olga nikolaevna [1]
2 years ago
14

I need help and thanks

Mathematics
1 answer:
DochEvi [55]2 years ago
8 0
(20/4)×7
280÷(7+3)×7
175÷8=21.875(round off to 22 as no.of chairs cannot have decimal place)
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72.3 + (-39.1)
joja [24]

Answer:

72.3 - 39.1 = 4tens - 7ones + 2tenth

Step-by-step explanation:

Give the expression 72.3 + (-39.1)

opening the parenthesis:

= 72.3 + (-39.1)

= 72.3 - 39.1

Breaking the decimal values into place values

72.3 = 7tens + 2units + 3tenth

72.3 = 7(10)+2(1)+3(1/10)

72.3 =70+2+0.3

Similarly for 39.1

39.1 = 3tens + 9units + 1tenth

39.1 = 3(10)+9(1)+1(1/10)

39.1 =30+9+0.1

72.3 - 39.1 = 70+2+0.3 - (30+9+0.1)

72.3 - 39.1 = 70+2+0.3 - 30-9-0.1

72.3 - 39.1  = 70-30+2-9+0.3-0.1

72.3 - 39.1 = 40 - 7 +0.2

72.3 - 39.1 = 4tens - 7ones + 2tenth

3 0
2 years ago
Everything I have no clue help me!
RideAnS [48]
-x -2 I think . 3-(-5)= -2 and 2x -3x = -x
5 0
3 years ago
Which is the best estimate of the solution to this system of equations ?
Ket [755]
The answer is (4,2). The solution to a system of equations is when there is an intersection.
6 0
3 years ago
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Help me please :/ ill mark you braniest also please show ur work
Nimfa-mama [501]

Answer:

Surface area = 2 (lw + lh + wh)

= 2 [(5*4) + (5*7) + (7*4)]

= 166 sq.mm

5 0
2 years ago
Twenty-one fish are swimming in an aquarium. Eleven are removed, leaving 10 fish. Which number is the additive inverse of the nu
agasfer [191]

The additive inverse: The usage of addition with a negative number.

The original equation is 21 - 11 = 10

To use the additive inverse, change it so that there is an addition sign.

21 + (-11) = 10

B) -11 is your answer

hope this helps

7 0
2 years ago
Read 2 more answers
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