Answer:
5z+1
Step-by-step explanation:
(3z-4)+(2z+5)
3z-4+2z+5
3z+2z-4+5
5z-4+5
5z+1
Using equations to solve the word problem, Katherine's age is 8 years
<h3>Word Problem</h3>
Word problem are often mathematical problem that are represented in words and sometimes can be solved using an equation.
To solve this problem, we have to represent the problem using mathematical equations;
Let;
Katherine's age = x²
Alexandra = 5(x + 1)
Sum of their age = 109
5(x + 1) + x² = 109
5x + 5 + x² = 109
x² + 5x - 104 = 0
Solving for the equation; x = 8
Katherine's age is 8
Learn more on word problem here;
brainly.com/question/13818690
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Answer: 5/10 or 1/2 mile
Step-by-step explanation: If you subtract 4/10 from 9/10, you get 5/10 miles left to bike. 5/10 simplifies to 1/2 mile.
.21 is decimal form, 21/100 is the fraction in simplest form.
Answer:
I = p× r× t
300×8×4
pinicipal × rate × time
That is the formula
the answer is 300×8×4= 9600
