MATHEMATICS
MIDDLE SCHOOL

Answer: equivalent expressions

Answer:

Answer:

Step-by-step explanation:

HIGH SCHOOL

What is the product of (4x + 3)(-2x - 5)?

Answer:

Expand the polynomial using the FOIL method.

− 8 x^ 2- 26 x − 15

HIGH SCHOOL

NEED HELP ASAP PLEEEASE :( I need to write an equation for this: Train A leaves a station at 8:00 and travels at 100 km per hour towards the next city. One and a half hours later, Train B, an express, leaves the same station, traveling at 160 km per hour along the same route. At what time will Train B overtake the slower train?

Let 'T' be the number of hours after 8:00. ... Distance 'A' = 100 T. ... Distance 'B' = 160 (T-1.5). ... At the time when the later, faster train catches up with the earlier, slower one, the distances are equal. Write an equation that says they're equal, solve it for 'T', and add 'T' hours to 8:00.

MIDDLE SCHOOL

A teacher buys 50 train tickets for a school trip for a total cost of $1,200. She buys x number of student tickets for $20 each. She also buys y number of adult tickets for $30 each. How many adult tickets did she buy?

Answer:

y=20 , x =30

Step-by-step explanation:

x+y=50;

20x+30y=1200

20x+20y=1000, multiplying the top by 20

-20x-30y=-1200, subtracting the second.

-10y=-200

y=20 adult tickets ($600)

x=30 student tickets ($600)

(add up to $1200)

MIDDLE SCHOOL

How do you write the sum of 7 times a number is equal to 9

answer:

7n = 9

work:

note: i'm going to assume you didn't mean sum since sum is addition.

let's analyze the question:

7 times a number

so, we have 7n

is equal to 9

so, 7n is equal to 9.

you can write this as: 7n = 9.

hope this helps, have a great day!

- Eviezoom