Mark is 3 less than 4 times as old as tim. Together their ages total 42. How old is mark
1 answer:
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Answer:
The expression that could be used is (-4)(3) + (-4)() ⇒ B
Step-by-step explanation:
Let us revise the distributive property:
<em>The product of a number and the sum of 2 other numbers equal to the sum of the products of the number with the other 2 numbers</em>
- a(b + c) = ab + ac
We will use this rule to solve the question
∵ The product of -4 and 3 = -4 × 3
→ We can right 3 as (3 +
)
∵ 3 = (3 +
)
∴ -4 × 3 = -4(3 +
)
→ By using the rule above
∵ -4(3 + ) = (-4)(3) + (-4)(
)
∴ -4 × 3 = (-4)(3) + (-4)(
)
∴ The expression that could be used is (-4)(3) + (-4)()
X≈1.5874
(Use the answer in the photo)
(Use the answer in the photo)
Answer:
Demetrius's account is $84 higher after the two transactions
Step-by-step explanation:
Let
x -----> original amount in Demetrius's account
y ----> amount in Demetrius's account after the deposit and the withdraws
we know that
The amount in Demetrius's account after the two transactions must be equal to the original amount in Demetrius's account plus the deposit minus the withdraws
so
therefore
Demetrius's account is $84 higher after the two transactions
