MathematicalUse Number Sense Duane and Mick are savingtheir money to build a tree house. Duane adds $5 to their piggybank every other week. Mick adds $2 every week. So far they havesaved $45. How many weeks have they been saving their money?
MathematicalUse Number Sense Duane and Mick are savingtheir money to - 1

Answers

Answer 1
Answer: assuming they start saving at 0 dollars

45=total=duanesavings+micksavings
duanesavings=confusing, I will explain
mick savings =amount saves per week times number of weeks

duane saves 5 dollars every other week, aka 2.5 dollars per 1 week
DS=2.5w
MS=2w

since they save at same time and at that week, when the weeks are equal (w=w), 45 it total

DS+MS=45
2.5w+2w=45
4.5w=45
divide by 4.5 both sides
w=10

10 weeks

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Which step should be completed first to solve the equation ?A.
Add 12 to both sides.

B.
Add 13 to both sides.

C.
Divide both sides by 8.

D.
Subtract 13 from both sides.

Answers

A. 

add 12 to both sides the divide 8 by both sides and there is the answer to x

Explain it - compare 3 3/22 & 3 2/33. which is greaterI Know:
 Multiply the denominator by the whole number then add numerator to that.
 Now I have 69/66 & 101/99

 THe LCM is 66


what next, which is greater. Thank you

Answers

3 3/22 isn't 69/66.
3 3/22 is like 3+3/22. To sum them,you have to have the same denominator. So 3=66/22. Know you can add them, so 3 3/22=3+ 3/22= 66/22+3/22=69/22.
Same way, 3 2/33= 3+2/33=99/33+2/33=101/33.
Know you have to compare 69/22 with 101/33. For this, you need to get them to the same denominator. So you multiply 69/22 with 3, and 101/33 with 2. Know you have to compare 207/66 with 202/66. Obviously, the first one is bigger, because 207>202. So in the end, 3 3/22> 3 2/33

Original amount 85. new amount 56

Answers

There is a 29 difference between the two.
29 amount difference. The equation would be, 85-29=56.

What is the perimeter of the figure to the nearest tenth of a millimeter?



A.
9.4 millimeters

B.
12.0 millimeters

C.
21.4 millimeters

D.
30.8 millimeters

Answers

We have to calculate the perimeter of the figure to the nearest tenth of a millimeter. This figure is made of a rectangle and a half of a circle. The first figure has the perimeter: 3 + 6 + 3 = 12 mm. The second figure has the perimeter: 2 * Pi * r / 2 = Pi * r ; and the radius : r = 6/2 = 3 mm. So Pi * 3 = 3.14 * 3 = 9.42. Fimally : 12 + 9.42 = 21.42 or 21.4 to the nearest tenth. Answer: C. 21.4 millimeters.

you miss three out of 10 questions on a science quiz and four out of 15 questions on the math quiz which quiz has a higher percent of correct answers

Answers

Answer:

4 out of 15 has the higher correct answer percentage

Step-by-step explanation:

Step 1:  Find the percentages.

If you missed 3/10 questions, then you got 7/10 right.

7/10 = 70%

If you missed 4/15 questions, then you got 11/15 right.

11/15 = 73%

So, you scored a 70% on the science quiz, and a 73% on the math quiz.

ANSWER:

The math quiz.

What is the definition of variable expression

Answers

In mathematics, a variable expression is an expression that contains operations, numbers, and variables.

For example, if I have 6 coins in my pocket in . addition to the number of coins that are in my jar at home, then then the total number of coins would be represented as X + 6.

X would represent the unknown amount of coins in my jar at home.

This would be a variable expression because it contains an operation "addition", a number "4", and a variable "X."

basically variable is a term that specifies unspecified numbers..
variable expression:
                           it is the algebraic expression in which both numbers and variables are comprised by means of arithmetic operations 
example:
1) 2a + 3
2) 5/2 - x