Answer:
Number of 10 cents = 18
Number of 20 cents = 10
Step-by-step explanation:
Let number of 10 cents be = x
Let number 20 cents be = y
Total number of coins = x + y = 28 -------- ( 1 )
Total amount in the box = 0.10 x + 0.20y = 3.80 ---------- ( 2 )
<em><u>Solve the equations to find x and y</u></em>
( 1 ) => x + y = 28
x = 28 - y
Substitute x in ( 2 )
( 2 ) => 0.10(28 - y) + 0.20y = 3.80
2.80 - 0.10y + 0.20y = 3.80
0.10 y = 3.80 - 2.80
0.10 y = 1.00
y = 10
Substitute y in ( 1 ) => x + y = 28
x + 10 = 28
x = 28 - 10
x = 18
Answer:
<h3>0.2</h3>
Step-by-step explanation:
Given a linear function f(x) that varies at a constant rate of change 1.5 with respect to x, If x varies from x = 1.3 to x = 1.5, the to get the amount by which x change by, we will use the expression;
Δx = x₂-x₁
x₂ is the final value of x
x₁ is the initial value of x
Given x₁ = 1.3 and x₂ = 1.5
Substitute the values in the formula above;
Δx = x₂-x₁
Δx = 1.5 - 1.3
Δx = 0.2
Hence the value of x change by 0.2
676 is the answer to 500+150+20+6
Answer:
2.25
Step-by-step explanation:
In this question, we are asked to calculate the number of slices to be eaten by a man who has restrictions on his diet.
Firstly, as we can see, he bought 3 which weighs a total of 1/3 pounds. The weight of one of this would be 1/3 divided by 3 = 1/9 pounds
Now to stay true to his weight by not exceeding 1/4, we need to know how many of the 1/9 can he eat. To solve this, we directly divide 1/9 by 1/4 = 1/4 divided by 1/9 = 2.25
Answer:
Jane
Step-by-step explanation:
because she sells 9 pairs for 7,76
