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attashe74 [19]
2 years ago
15

Which equation can be used to solve for x xx in the following diagram? Choose 1 answer: (Choice A) A ( 5 x + 30 ) − 5 x = 90 (5x

+30)−5x=90left parenthesis, 5, x, plus, 30, right parenthesis, minus, 5, x, equals, 90 (Choice B) B ( 5 x + 30 ) + 5 x = 180 (5x+30)+5x=180left parenthesis, 5, x, plus, 30, right parenthesis, plus, 5, x, equals, 180 (Choice C) C ( 5 x + 30 ) + 5 x = 90 (5x+30)+5x=90left parenthesis, 5, x, plus, 30, right parenthesis, plus, 5, x, equals, 90 (Choice D) D 5 x = ( 5 x + 30 ) 5x=(5x+30)

Mathematics
1 answer:
Alona [7]2 years ago
7 0

Answer: answer is C

Step-by-step explanation:

for find x
(5x+30)+5x=90
 5x+30+5x=90 add like terms
after,
 10x+30=90
10x+30-30=90-30
 10x/10=60/10
   x = 6

to obtain answer as C
it mean
(5x+30)+5x=90
(5(6)+30)+5(6)=90 we know x=6 so add 6 to x and multiply and obtain answer is correct!
30+30+30=90

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Solve the following equation. –4y + 8 = 4(2y – 2) – 2(–16 + 8y) A. y = –4 B. y = 4 C. y = –2 D. y = –6 I need Help I am utterly
leonid [27]
The answer is B. (y = 4)


Further explanation:

–4y + 8 = 4(2y – 2) – 2(–16 + 8y)
= -4y + 8 = 4 * (2y -2) - 2 * (-16 + 8y)
= -4y + 8 = ( 4 * 2y - 4 *2 ) - (2 * -16 - 2 * 8y )
= -4y + 8 = 8y - 8 - ( -32 - 16y)
= -4y + 8 = 8y - 8 + 32 + 16y
Move y’s to the left & numbers to the right
= -4y - 8y - 16y = -8 + 32 - 8
= 12y - 16y = -16 + 32
Y = 16 / 28
Y = 4 = (B choice)
3 0
3 years ago
A deck of cards contains 6 black cards and 6 red cards. The first card drawn is not replaced before drawing the second card.
exis [7]

Answer : 5/22

A deck of cards contains 6 black cards and 6 red cards. The first card drawn is not replaced before drawing the second card.

Total number of outcome of cards = 12

Probability( any event)= favorable outcomes divide by total number of outcomes

Probability of selecting black card = \frac{6}{12} =\frac{1}{2}

The drawn card is not replaced . so 11 cards left . In that 11 cards, 5 black cards because one black card is already chosen

Probability of selecting another black card = \frac{5}{11}

Probability of selecting a black card followed by another black card =

= \frac{1}{2}*\frac{5}{11}

=\frac{5}{22}



4 0
3 years ago
Answer please...................
Debora [2.8K]
It means that all values of x would make it true. Also take a look at the equation when we simplify:

4x + 7 = 1 + 4x + 6
Which simplified turns into
4x + 7 = 4x + 7

So no matter what value you put for x, it will be the same on both sides, making all values true for x.
5 0
3 years ago
Solve the following equations for x (5 points each). (a)-3x+10=34
yan [13]

Answer:

x = -8

Step-by-step explanation:

6 0
3 years ago
What is the surface area
nexus9112 [7]

Answer:

A 1759 sq. units

Step-by-step explanation:

to find the surface area of a closed cylinder the formula is

2πr² + πdh

r = radius = 10

d = diameter = 10 + 10 = 20

2 x 3.14 x 10² + 3.14 x 20 x 18

628.3 + 1130.94 = 1759.24

ans = 1759

5 0
3 years ago
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