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Dvinal [7]
3 years ago
14

397 students went on a field trip. Eight

Mathematics
1 answer:
lbvjy [14]3 years ago
8 0

Answer:48

Step-by-step explanation:

Total number of students=397

Students that travelled in a car=29

Let the students that travelled in a bus be represented by y.

Since 8 buses were filled, it will be 8y for total students

8y + 29= 397

8y= 397-29

8y= 368

Divide both side by 8

8y/8=368/8

y = 46

Number of students in each bus is 46

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anyanavicka [17]

Answer:

x =  \frac{ - 3}{2}  \: or \:  \frac{1}{3}

Step-by-step explanation:

7 {x}^{2}  + 10x - 3 =  {x}^{2}  + 3x

=  > 7 {x}^{2} -  {x}^{2}   + 10x - 3x -3  = 0

=  > 6 {x}^{2}   +  7x - 3 = 0

= > 6 {x}^{2}  + 9x - 2x  - 3 = 0

=  > 3x(2x + 3) - 1(2x + 3) = 0

=  > (2x + 3)(3x - 1) = 0

Here x will have 2 values.

1) 2x + 3 = 0

=  > 2x =  - 3

=  > x =  \frac{ - 3}{2}

2)3x - 1 = 0

=  > 3x = 1

=  > x =  \frac{1}{3}

4 0
2 years ago
The table shows the relationship between two variables. which selection describes the relationship?
Liula [17]

Answer:

The relationship between two variables is decreasing and linear.

Step-by-step explanation:

From the given table it is notice that the function passing through the points (1,5), (2,-1), (3,-7) and (4,-13).

Slope of the function between first two points (1,5) and (2,-1) is

m_1=\frac{y_2-y_1}{x_2-x_1}=\frac{-1-5}{2-1}=-6

Slope of the function between last two points (3,-7) and (4,-13) is

m_2=\frac{y_2-y_1}{x_2-x_1}=\frac{-13+7}{4-3}=-6

The rate of change or slope of the function is constant.

From the given table it is noticed that the values of y decreased by 6 units as the values of x increased by 1 units.

Since the rate of change constant and negative, therefore the relationship between two variables is decreasing and linear.

4 0
3 years ago
Read 2 more answers
Mr. Jenkins was arranging chairs for a school awards assembly. Each row contained 15 chairs. If there were 21 rows. how many cha
g100num [7]

Answer:

315 chairs

Step-by-step explanation:

This question can instill your quick calculation skills which can be very useful when it comes to event planning.

1 row of chairs = 15 chairs

21 rows of chairs = 15 x 21

= 315 chairs.

5 0
2 years ago
Given that 16 ounces equals 1 pound, how many ounces are in 8.9 pounds
pishuonlain [190]
Hi,
About 142.4 is the answer!

I hope this helped!
5 0
3 years ago
Read 2 more answers
HELP ASAP!!!!!!!! 15 POINTS + BRAINLIEST!!!!!!
Andre45 [30]
A) c=18
0.5c^2 +13=94
subtract 13 from both sides
0.5c^2 = 81
Square root of both sides to get c alone
0.5c=9
double c to make it just c
c=18

B) x=8
(x-2)^2+1=37
Subtract one from each side
(x-2)^2=36
square root each side
x-2=6
add the 2 over
x=8
6 0
3 years ago
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