Answer:
a) (+) × (?) = (+)
(?) = (+)
b) (-) × (+) = ?
? = (-)
c) (?) × (-) = ?
? is undefined
Step-by-step explanation:
a) (+) × (?) = (+)
From the given equation in the question, by dividing both side of the equation by (+), we have;
((+) × (?))/(+) = (+)/(+)
(?) = (+)/(+) = (+)
Therefore, we have;
(+) × (+) = (+)
(?) = (+)
b) (-) × (+) = ?
From the given equation in the question we apply the operation rules as follows;
(-) × (-) = (+)
(-) × (+) = (-)
Therefore;
(-) × (+) = ? = (-)
? = (-)
c) (?) × (-) = ?
From the rules of multiplication, we have;
(-) × (-) = (+)
(+) × (-) = (-)
Therefore, when (?) = (-), ? = +, from which we have;
(?) ≠ ?, which is an error
Similarly, when (?) = (+), ? = -, therefore, (?) and ?, always changes sign
Therefore, the equation, (?) × (-) = ?, is undefined.
Answer:
She took $30.50 to the mall originally
Step-by-step explanation:
Let us solve the problem step by step
∵ She spent $5.25 on earrings
∵ The price of the shirt is 3 times the price of the earrings
∴ The price of the shirt = 3 × 5.25 = 15.75
∴ She spent $15.75 on the shirt
Find her total spending in the mall by adding the prices of earrings and the shirt
∴ She spent = 5.25 + 15.75 = 21
∴ She spent $21 on the mall
∵ She came home with $9.50
∵ She spent $21 on the mall
- Add them to find her original amount of money
∴ She took = 21 + 9.50 = 30.50
∴ She took $30.50 to the mall originally
All of them are 3.14
I got them all right on I ready :)))
