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3 years ago

In the number sentence 12 - (7 - 1) + (8 ? 2) = 10 the ? must be

Mathematics

2 answers:

OLga [1]3 years ago

8 0

Is the question mark + or -. If it’s plus the answer would be 16 if it’s minus the answer would be 10.

attashe74 [19]3 years ago

7 0

The answer is that the ? must be -.

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Consider triangle ABC where AB=X+5, BC=X-2, area is 30cm squared. Find X by solving X^2+3X-70=0, and find the perimeter.

klasskru [66]

Answer:

What the hell AC is not given so you can't find the Perimeter

Step-by-step explanation:

x^2+3x-70=0

(x-7)(x+10)=0

x-7=0

x+10=0

x=-10

AB=x+5

AB=12

AB=-5

BC=x-2

BC=5

BC=-12

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Perimeter of ABC = AB+BC+AC

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2 years ago

What is the value of 5 in 756

BartSMP [9]

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3 years ago

What is 16.92 x 8.4 how much is the sum.

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2 years ago

Read 2 more answers

FUNCTION OR NOT /// ALGEBRA I

guapka [62]

Answer:

First figure: The graph is not a function

Second figure:

Statement 1: It is false

Statement 2: It is false

Statement 3: It is right

Step-by-step explanation:

First graph is not a function.

The domain of it is ⇒ 0 ≤ x < 3 , 3 < x ≤ 6 , 6 ≤ x < 9

From the domain ⇒ x = 6 has two corresponding values of y⇒ 3 and 4

∴ It is not a function because every x must have one and only one

corresponding value of y

Second figure

{(3 , 6) , (4 , 6) , (5 , 7) , (6 , 8) , (7 , 10) , (8 , 10)}

Statement 1: It is false because we use x-value to check function or not.

The relation is a function because every x-value has one corresponding

y-value

Statement 2: It is false because 3 ≤ x ≤ 8 means we will use for x all real numbers from 3 to 8 not only the integers 3 , 4 , 5 , 6, ,7 , 8

The domain of this function is { 3 , 4 , 5 , 6 , 7 , 8 }

Statement 3: It is right because the range is the y-value and all the y-value in the function are 6 , 7 , 8 , 10

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3 years ago

The table shows the distances and times that four rowboats traveled. Which rowboat was the fastest?

g100num [7]

Answer: the answer is C

Step-by-step explanation:

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3 years ago

In the number sentence 12 - (7 - 1) + (8 ? 2) = 10 the ? must be​

In the number sentence 12 - (7 - 1) + (8 ? 2) = 10 the ? must be