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kari74 [83]
3 years ago
11

Which is more efficient way to solve this equation x + 7 = 12

Mathematics
2 answers:
SCORPION-xisa [38]3 years ago
8 0

Answer: subtract 5 from both sides to get x by itself

Step-by-step explanation:

kari74 [83]3 years ago
4 0

Answer:

x=5

Step-by-step explanation:

x+7=12

x=12-7

x=5

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Write an equation for a line perpendicular to f(x)=5x−1 and passing through the point (5,20)
Bogdan [553]

Answer:

y - 20 = (-1/5)(x - 5)

Step-by-step explanation:

The slope of the given line is 5.  The slope of any line perpendicular to the given line is the negative reciprocal of the given slope:  

Slope of perpendicular line here is -1/5.

We use the point-slope formula as a framework here:

y - 20 = (-1/5)(x - 5)

3 0
3 years ago
Charlie solved an equation, as shown below:
Alex73 [517]
Part A:  Charlie's answer is incorrect
In step 2 of Charlie's answer he subtracted 5 from each side.  Since 5x is multiplication, he must DIVIDE each side by 5 to get x by itself.  The problem should have worked out like this...

Step 1:  5x = 30
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Part B:  There is only 1 solution for this problem.
6 0
3 years ago
Help me please I don't understand! 0
yawa3891 [41]
1. Right
2. I forgot how to do that
3. X is 45
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5 0
4 years ago
Hola alguien puede ayudarme a resolver estos ejercicios por favor Ejercicios de intervalos 1.- Escribe en todas las formas posib
yawa3891 [41]

Answer:

Tenemos 3 formas de escribir cada intervalo, una es con solo texto, la otra es usando los símbolos { <, >, ≤, ≥ }, y la última es con intervalos, donde:

( se usa para " < x "

) se usa para " > x "

[ se usa para  " ≤ x "

] se usa para   " ≥ x "

a) -2 ≤ x ≤3

Esto se escribe como:

"números mayores o iguales que -2 y menores o iguales que 3"

y

[-2, 3]

b) Números mayores que –1

Las otras formas de escribir esto son:

-1 < x

y no tenemos limite mayor, entonces:

(-1, ∞)

con -∞ y ∞ siempre se usan los símbolos ( o )  

c) (–[infinity], –5]  

Las otras notaciones son:

"Un numero menor o igual que -5"

x ≤ -5

d)  Números mayores o iguales que –7 y menores que 19

Las otras notaciones son:

-7 ≤ x < 19

[-7, 19)

e) Números mayores que 9 y menores que 5.

Las otras formas de escribir esto son:

5 < x < 9

(5, 9)

8 0
3 years ago
Kal is decorating the outside edge of a square bulletin board. He needs to know the side length of the bulletin board. The area
pochemuha

Answer: i am kai

Step-by-step explanation:kai am i

5 0
3 years ago
Read 2 more answers
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