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2 years ago

Which expression does not belong with the other three? Explain your reasoning. 8 = x —2 3 = x ÷ 4 x − 6 = 5 x —3 = 9

Mathematics

1 answer:

Scorpion4ik [409]2 years ago

4 0

Answer:

3 = x ÷ 4

Step-by-step explanation:

<u>Given expressions:</u>

8 = x - 2 ⇒ x = 8 + 2= 10
3 = x ÷ 4 ⇒ x = 3*4 = 12
x - 6 = 5 ⇒ x = 5 + 6 = 11
x - 3 = 9 ⇒ x = 9 + 3 = 12

3 of them involves addition, one of them - multiplication

The second expression doesn't belong

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If LM = 20 cm, and PQ = 16 cm, what is the length of RM, in centimeters?

LuckyWell [14K]

Answer:

RM = 12 cm

Step-by-step explanation:

$a^{2} + b^{2} = c^{2}$

Assuming 20 is the hypotenuse cus there is no picture:

$a^{2} + 16^{2} = 20^{2}$

$a^{2} +256 = 400$

$a^{2} = 144$

$a=144$

If It's not the hypotenuse:

$16^{2}+ 20^{2} =c^{2}$

$256+400 =c^{2}$

$656=c^{2}$

$c = 25.61249695$

But I find it unlikely that 20 wasn't the hypotenuse so ignore that unless it applies.

Hope this helped. :0)

5 0

2 years ago

The number of windows on each floor form an arithmetic sequence; 124 windows on the first floor, 116 windows on the second floor

zubka84 [21]

Answer:

Formula is 132 - 8n, and there are 52 windows on 10th floor.

Step-by-step explanation:

difference = 116-124 = -8 ( 8 less windows for every floor you go up)

the first fllor has 124 windows

Formula:

$a_{1} = 124$

$a_{n} = 124 + (-8)(n - 1)$ = 132 - 8n

10th Floor:

$a_{10} = 124 + (-8)(10 - 1) = 124 + (-8)(9) = 124 - 72 = 52 windows$

6 0

2 years ago

Solve 3(x+2)+5(x+2)=64

valkas [14]

Answer:

Step-by-step explanation:

3x+6+5x+10=64

3x+5x+6+10=64

8x+16=64

8x=64-16

8x=48

divide both sides by 8

x=6

6 0

3 years ago

The length of a garden is 5m greater than the width. the area is 66m^2. Find the dimensions of the garden.

11Alexandr11 [23.1K]

W^2+5w-66=0
Factor
(w+11)(w-6)=0

w+11=0
w=-11 (not possible - cant have negative length

w-6=0
w=6

L(6)=66
L=11

Width = 6
Length = 11

8 0

3 years ago

Explain how to solve an inequality by finding equivalent inequalities

Free_Kalibri [48]

Answer:

cheat off somebody who has the answer

Step-by-step explanation:

3 0

2 years ago