Which of the following answers gives the best estimate for x given the following equation?
−2x+902=1,518
(1 point)
Responses
−300
negative 300
600
600
300
300
−600
negative 600
Are these even right?
There are three petri dishes in a laboratory. The first one contains 22,340 cells, the second contains 43,560 cells, and the last dish contains 36,612 cells. Approximately how many cells are there in total?(1 point)
Responses
1,000,000
1,000,000
100,000
100,000
10,000
10,000
150,000
To find the approximate total number of cells in the three petri dishes, we need to add the number of cells in each dish.
22,340 + 43,560 + 36,612 = 102,512
Therefore, the approximate total number of cells in the three petri dishes is 102,512.
None of the given answer choices provide the correct approximate total.
Which of the following answers gives the best estimate for x given the following equation?
x/50−94=189
(1 point)
Responses
150,000
150,000
1,500
1,500
15,000
15,000
150
To find the value of x in the equation x/50 - 94 = 189, we need to isolate x.
First, we add 94 to both sides of the equation:
x/50 - 94 + 94 = 189 + 94
x/50 = 283
Next, we multiply both sides of the equation by 50 to eliminate the fraction:
(50)(x/50) = (50)(283)
x = 14,150
So, the best estimate for x is 14,150.
Therefore, the answer choice that gives the best estimate for x is 15,000.
A local taqueria sold 11,321 carne asada tacos, 13,132 chicken tacos, and 8,982 carnitas tacos last year. If each taco was sold for $3.89, which value best estimates their total earnings from tacos?(1 point)
Responses
$33,000
$33,000
$130,000
$130,000
$160,000
$160,000
$90,000
To find the total earnings from tacos, we need to multiply the number of each type of taco sold by the price per taco and then add them together.
For carne asada tacos:
11,321 * $3.89 = $44,011.69
For chicken tacos:
13,132 * $3.89 = $51,034.48
For carnitas tacos:
8,982 * $3.89 = $34,949.58
Now, we add these three values together:
$44,011.69 + $51,034.48 + $34,949.58 = $129,995.75
Therefore, the value that best estimates their total earnings from tacos is $130,000.
The answer choice is $130,000.
Which of the following answers gives the best estimate for x given the following equation?
21x+1,998=2,243
(1 point)
Responses
100
100
10
10
1,000
1,000
1
To find the value of x in the equation 21x + 1,998 = 2,243, we need to isolate x.
First, subtract 1,998 from both sides of the equation:
21x + 1,998 - 1,998 = 2,243 - 1,998
21x = 245
Next, divide both sides of the equation by 21 to solve for x:
(21x) / 21 = 245 / 21
x = 11.67
So, the best estimate for x is 11.67.
Therefore, the answer choice that gives the best estimate for x is 10.
To find the value of x in the equation -2x + 902 = 1,518, we need to isolate x.
First, we subtract 902 from both sides of the equation:
-2x + 902 - 902 = 1,518 - 902
-2x = 616
Next, we divide both sides of the equation by -2:
-2x / -2 = 616 / -2
x = -308
So, the best estimate for x is -308.
Therefore, none of the given answer choices provide the correct estimate for x.