Determine the x-intercept, y-intercept, and slope of the line described by -3x+7y=-21
Answers
Answer:
Step-by-step explanation:
Comparing to Y = MX + c
M is the slope and c is intercept
-3x+7y=-21
7y = 3x - 21
y = 3/7x - 21/7
y = 3/7x - 3
Slope= 3/7
Intercept= -3
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Answers
Answer:
He would pay $5.49.
Step-by-step explanation:
Edward paid $4.77 in sales tax on an item that cost $53 before tax.
Percentage of sales tax given on the item = × 100
= 0.09 × 100
= 9%
9% sales tax of an item that cost 61.00 = × 61
= 0.09 × 61
= $5.49
He would pay $5.49 in sales tax for an item that cost $61.00 before tax.
Answer:
The cost with tax is $66.49
Step-by-step explanation:
100% = 53
53 ÷ 100 = 0.53
4.77 ÷ 0.53 = 9% (sales tax)
100% = 61
109% = 61 + sales tax
61 x 1.09 = $66.49
Answers
16.9 + 12.1 = 29
16.9 - 12.1 = 4.8
When you subtract it mentally you'd get 4.8
Answers
The value of the unknown number which on multiplication with 4 will give 60 is x = 15.
What is an expression?
Expression in maths is defined as the relation of numbers variables and functions by using mathematical signs like addition, subtraction, multiplication and division.
Given that result is 60 when the number 4 is multiplied by the number x,
The value of the unknown number will be calculated as:-
4 x ( X ) = 60
Divide the number 60 by the number 4 to get the value of x,
X = 60 / 4
X = 15
Therefore, the value of the unknown number will be 15.
To know more about an expression follow
#SPJ2
So the answer is 15.
Answers
Distributive property of multiplication has two expressions:
1.
2.
If you use these formulas from the left side to the right side, you should see for the sign in the brackets: "+" - use addition, "-" - use subtraction. If you use these formulas from the right side to the left side, you should also take into account sign between and
: for "+" - use addition in brackets and for "-" - use subtraction in brackets.
The correct answer is:
We treat the addition or subtraction signs inside the parentheses as positive and negative signs and follow our integer rules.
Explanation:
Take for example -3(x+y). The distributive property tells us to take -3*x + -3*y; we have a positive multiplied by a negative, which is a negative, and another positive multiplied by a negative, which is again a negative. This gives us -3x+-3y, or -3x-3y.
If we consider the sign of the value outside the parentheses as well as the signs of those inside, we can be sure to use the write operation sign.