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Sergio [31]
3 years ago
6

When 4 times a number is increased by 40, the answer is the same as when 100 is decreased by the number. find the number?

Mathematics
1 answer:
umka21 [38]3 years ago
8 0
The number is x

4x+40=100-x
add x to both sides
5x+40=100
minus 40 both sides
5x=60
divide both sides by 5
x=12
the number is 12
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Find two consecutive even integers whose sum is 30
Yuliya22 [10]

Answer:

14 & 16

Step-by-step explanation:

30÷2=15

15+15=30, so we can make the conclusion...

14+16=30

3 0
3 years ago
Find the product. Simplify.<br> (a + 1)(a –5)=
Morgarella [4.7K]

Answer:

(a + 1)(a - 5) \\   {a}^{2}  - 5a +  a- 5 \\  {a}^{2}  - 4 a- 5

4 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
A data set is made up of these values.
AVprozaik [17]

Answer:

The answer is C. 7 - 3 = 4

Step-by-step explanation:

The median is 6 and the first quartile is 3 and the third quartile is 7. Ap3x certified!Have a great day hope this helps!

5 0
3 years ago
What is -86+(-13) what is the answer
ValentinkaMS [17]
It will help you.

And the answer is -99 feet below the surface.

-86+(-13)
= -99
6 0
3 years ago
Read 2 more answers
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