how many side and angles does a trapezoid angle, hexagon, and pentagon have?
solve each equation:
13 + y = -3, 3y + 8=3, y over 3= -9
need help with + & - rules for adding whole numbers, decimals, fractions and integers ( do not understand) and rule for multiplying + & -
Google the fist question
hint --- hex means 6 and pent means five
13 + y = -3
-13 = -13 add
-----------------
13-13 + y = -16
y = -16
=============================
3y + 8=3
-8 = -8 add
---------------
3 y + 0 = -5
y = -5/3
=============================
y over 3= -9
3 (y/3) = 3 (-9)
y = -18
sorry i do not understand. this is 6th grade math. i am suppose to solve for y. not change what it is equal to.
13 + y = -3
A trapezoid has 4 sides and 4 angles. A hexagon has 6 sides and 6 angles. A pentagon has 5 sides and 5 angles.
Let's solve each equation you provided:
1) 13 + y = -3
To solve for y, you need to isolate y on one side of the equation. Since y is added to 13, the opposite operation is subtraction. Perform the same operation to both sides of the equation:
13 + y - 13 = -3 - 13
y = -16
So the solution for y is -16.
2) 3y + 8 = 3
To solve for y, again you need to isolate y on one side of the equation. Since y is multiplied by 3, the opposite operation is division. Perform the same operation to both sides of the equation:
(3y + 8)/3 = 3/3
y + (8/3) = 1
y = 1 - (8/3)
y = 1 - 2.67
y = -1.67 (rounded to two decimal places)
So the solution for y is approximately -1.67.
3) y/3 = -9
To solve for y, you need to isolate y on one side of the equation. Since y is divided by 3, the opposite operation is multiplication. Perform the same operation to both sides of the equation:
(y/3) * 3 = (-9) * 3
y = -27
So the solution for y is -27.
Now let's discuss the rules for adding and subtracting different types of numbers:
To add or subtract whole numbers, simply combine their numerical values. For example:
7 + 3 = 10
15 - 6 = 9
To add or subtract decimals, align the decimal points and perform the operation. For example:
4.5 + 2.3 = 6.8
9.7 - 3.2 = 6.5
To add or subtract fractions with the same denominator, add or subtract their numerators while keeping the denominator the same. For example:
1/4 + 3/4 = 4/4 = 1
5/8 - 2/8 = 3/8
To add or subtract fractions with different denominators, find a common denominator and then proceed with the operation. For example:
1/3 + 1/5 = 5/15 + 3/15 = 8/15
2/7 - 1/4 = 8/28 - 7/28 = 1/28
To add or subtract integers, consider their signs. If the signs are the same, add the numbers and keep the sign. If the signs are different, subtract the numbers and use the sign of the larger number. For example:
-5 + (-3) = -8
7 + 3 = 10
-4 - 2 = -6
5 - (-3) = 8
Now, let's discuss the rules for multiplying and dividing positive and negative numbers:
When multiplying two numbers with the same sign (both positive or both negative), the result is always positive. For example:
3 * 4 = 12
(-2) * (-5) = 10
When multiplying two numbers with different signs (one positive and one negative), the result is always negative. For example:
5 * (-2) = -10
(-3) * 4 = -12
When dividing two numbers with the same sign, the result is always positive. For example:
12 / 3 = 4
(-15) / (-5) = 3
When dividing two numbers with different signs, the result is always negative. For example:
10 / (-2) = -5
(-12) / 3 = -4
I hope this explanation helps you understand the concepts better! Let me know if you have any further questions.