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VLD [36.1K]
3 years ago
15

Evaluate the expression 4(2x + 3) + 2(x + 1)-7

Mathematics
1 answer:
Svetlanka [38]3 years ago
4 0
4 (2x + 3) + 2 (x + 1) - 7

8x + 12 + 2x +  2 - 7

10x + 7

10x = -7
10x/10 = -7/10

x = -7/10

hope this helps


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Please help me out thank you
Leno4ka [110]

Answer:

  1. (-0.0008)^0 =1
  2. 1291^1 =1
  3. (1/3)^0 = 1

Step-by-step explanation:

\mathrm{Apply\:exponent\:rule}:\quad \:a^0=1,\:\\\\(-0.0008)^0 = 1\\\\1291^0 =1\\\\-(-3141)^0 = -1\\\\-(\frac{5}{8} )^0 =-1\\\\0^1 = 0\\\\(\frac{1}{3} )^0 = 1\\

6 0
3 years ago
9+3.5g=11−0.5g<br> g=????
Hoochie [10]
Substitution. g= 1/2
3 0
3 years ago
Raj tried to solve the system below.
jekas [21]

Answer: Option C) Raj forgot the negative when substituting -15+9x for y.


Solution:

(1) 9x-y=15

(2) 2x+8y=28

Isolating y in the first equation. Subtracting 9x both sides of the equation:

(1) 9x-y-9x=15-9x

Subtracting:

(1) -y=15-9x

Multiplying both sides of the equation by -1:

(1) (-1)(-y)=(-1)(15-9x)

(1) y=-15+9x

Then Raj found the value of y. It's not option D.

Substitutng y by -15+9x in the second equation:

(2) 2x+8(-15+9x)=28

Then option C) is the answer: Raj forgot the negative when substituting -15+9x for y.

Eliminating the parentheses applying the distributive property in the multiplication:

(2) 2x-120+72x=28

Adding similar terms:

(2) 74x-120=28

Solving for x. Adding 120 both sides of the equation:

(2) 74x-120+120=28+120

Adding:

(2) 74x=148

Dividing both sides of the equation by 74:

(2) 74x/74=148/74

Dividing:

(2) x=2

Solving for y: Replacing x by 2 in the first equation:

(1) y=-15+9x

(1) y=-15+9(2)

Multiplying:

(1) y=-15+18

Subtracting:

(1) y=3  

3 0
3 years ago
Read 2 more answers
What is the answer and why?
Sati [7]
A is the answer, because 3/5=.60 and 37.5/62.5=60
6 0
3 years ago
A trail mix has 4 cups of raisins, 3 cups of dates, 6 cups of peanuts, and 2 cups of cashews, which ingredients are in the same
bija089 [108]
The ingredients that are in the same ratio as cashews to raisins would be peanuts is to dates. The ratio for cashews to nuts would be 4 is to 2 which can be reduced to 2 is to 1 which is true for peanuts is to dates. Hope this answers the question. Have a nice day. Feel free to ask more questions.
4 0
3 years ago
Read 2 more answers
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