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3 years ago

Can someone help me PLEASE

Mathematics

1 answer:

Arisa [49]3 years ago

7 0

Let's solve this problem step-by-step:

$7 * 9 = (7*10)-(7*x)$

x: it is the delta in the equation given in your picture

We know (7*10) - (7*x) is equivalent to the 7*(10-x)

⇒ based on the Distributive Properties

$a*(b+c) = ab + ac$

$7*(10+(-x))=(7*10)+(7*(-x)=(7*10)-(7*x)$

So:

$7*9=7(10-x)\\9=10-x\\x=10-9\\x= 1$

Thus delta (the little triangle in this problem) in this case is 1

Answer: 1

Hope that helps!

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Please help!

zepelin [54]

9514 1404 393

Answer:

14 minutes

Step-by-step explanation:

Let t represent the time it took Suki to pick out her pumpkin. The given relation is ...

10t -13 = 127 . . . . . equation for minutes to carve

10t = 140 . . . . . . . . add 13

t = 14 . . . . . . . . . . divide by 10

It took Suki 14 minutes to pick out her pumpkin.

5 0

3 years ago

PLEASE SOMEONE HELP ME WITH THIS! NO ONE CAN FIGURE IT OUT AND ILL GIVE YOU 60 POINTS PLUS BRAINLIEST IF YOU CAN HELP ME! please

Anit [1.1K]

A) Variables:

X = number of weeks she puts money into the account.

Y = total amount in account after x weeks.

B) m would be the amount she puts in per week, b is the starting amount she has in the account

Y = 5x + 40

C) replace x with the x values in the cart and solve for y:

O : y = 40. Coordinates (0,40)

1: Y = 45. (1,45)

2: 50, (2,50)

3: 55, (3,55)

4: 60, (4,60)

D) make the graph using the above points

E) y intercept is when x is 0, which is 40. This was the starting value of how much money was saved.

6 0

3 years ago

John’s piggy bank contained 7 dimes and 3 quarters. He pulled out 1 coin without looking. Without replacing the first coin, John

yKpoI14uk [10]

Probability Trees - See linked image

A good visual method for this is a probability tree.

Each set of branches represents the probabilities of on coin being removed, the second set is out of 9 as the first coin is taken and not replaced.
Multiply along the lines to work out the probability of each of the combinations.

*Even though only 'Dime Dime' is needed, it is best to do all of them as this way you are able to get all marks in an exam; you can also add up all the final values as a check to see if you are right.