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Illusion [34]
3 years ago
7

*URGENT* PLEASE HELP

Mathematics
1 answer:
Dafna11 [192]3 years ago
3 0
Create 2 eq’n, let V = vans and B= buses

1. 150 = 8v + 14b
2. b + v = 15

isolate one variable and substitute it in to an equation:

b = 15 - v

sub “b” into first equation above:

150 = 8v + 14 ( 15 - v)
150 = 8v + 210 - 14v
-60 = -6v
10 = v

sub “v” into equation 2

b = 15 - v
b = 15 - (10)
b= 5

there will be 5 buses and 10 vans to hold 150 students.
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harry is trying tq solve the equation y=2x^2 -x-6 using the quadratic formula he has made an error in one of the steps below
Sergeeva-Olga [200]

Answer:

Hello :

y = 2x² - x -6

y = 2 ( x² - 1/2 x - 3)

y = 2 (x² -1/2 x + 1/16 -1/16 -3)

y = 2 (( x - 1/4 )² - 49/16).....  the quadratic formula

y = 0 :  ( x - 1/4 )² - 49/16 = 0

( x - 1/4 )² - (7/4)² = 0

( x -1/4-7/4)( x -1/4+7/4)=0

(x -2)(x + 3/2) = 0

x - 2 = 0 or x + 3/2 =0

x = 2 or x = - 3/2



3 0
3 years ago
I'm only good at answering not solving:,)
Mazyrski [523]

Answer:

1/3 chance for even 1/3 chance for odd

7 0
3 years ago
Read 2 more answers
Tom is buying topsoil for the flower bed shown below. One bag of topsoil covers 151515 square meters. How many bags of topsoil d
exis [7]

Answer:

2 bags of topsoil.

Step-by-step explanation:

The attached figure shows a flower bed.

One bag of topsoil covers 15 square meters.

We need to find how many bags of topsoil does Tom need to cover his flower bed.

The area of the flower bed is :

A=\dfrac{1}{2}\times 12\times 5\\\\=30\ m^2  

Let he has to cover x bags of topsoil. So,

x = Area of flower bed/Area of 1 bag of top soil

x = 30/15

x = 2

Hence, he will need 2 bags of topsoil to cover his flower bed.

6 0
3 years ago
Should you flip the inequality sign in this problem?<br> -9x + 27 = -13<br> Yes no
Angelina_Jolie [31]

Answer:

Step-by-step explanation:no you should not

-9x+27=-13

-9x-27=13

-9x=18

-2=x

3 0
3 years ago
Read 2 more answers
PPPLLLLEEEAASSSEEEE HHHEEEELLLLPPPPP!!!!!!!
Yuliya22 [10]

Answer:

(3, 3) × 13 = (39, 39)

(0, 3) × 13 = (0, 39)

(6, -6) × 13 = (78, -78)

(9, 6) × 13 = (117, 78)

Step-by-step explanation:

Because the center of dilation is at (0, 0), or the origin, we can just multiply the x and y values of each point by the scale factor of 13.

(3, 3) × 13 = (39, 39)

(0, 3) × 13 = (0, 39)

(6, -6) × 13 = (78, -78)

(9, 6) × 13 = (117, 78)

Read more on Brainly.com - brainly.com/question/11445104#readmore

4 0
4 years ago
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