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2 years ago

Help 6th grade math!

Mathematics

1 answer:

ddd [48]2 years ago

7 0

Answer:

The opposite of -4 1/2 is 4 1/2. Both are 4 1/2 units from zero.

Step-by-step explanation:

The opposite of -4 1/2 is 4 1/2. Both are 4 1/2 units from zero.

See attachment with a number line.

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Andrea wants a diamond necklace and its selling price is $60. There was a discount of 5%. How much did Andrea pay?

devlian [24]

So discount means less so find 5%
remember that percent means parts out of 100 so
5%=5/100=1/20
find 1/20 of 60
'of' means mulitpy in math
1/20 ties 60=3
5%=3
discoutn is 3
subtract 3 from 60
60-3=57

she paid $57

6 0

4 years ago

Read 2 more answers

find the cost of carpeting the following rectangular rooms:a. Dimensions: 7.5m x 4.5m; Cost= $14.17/m^2b. Dimensions: 17 yd. x 1

Bezzdna [24]

Dimensions: 7.5m x 4.5m

Cost , x= $14.17/m^2.

The area of the rectangular room can be calculated as,

$\begin{gathered} A=7.5\times4.5 \\ =33.75m^2 \end{gathered}$

Now, the cost of carpeting the rectangular room is,

$\begin{gathered} C=xA \\ =14.17\times33.75 \\ =478.24\text{ } \end{gathered}$

Therefore, the cost of carpeting the room with dimensions 7.5m x 4.5m is $478.24.

Dimensions: 17 yd. x 12 yd.

Cost, x= $25/yd^2.

The area of the rectangular room can be calculated as,

$\begin{gathered} A=17\times12 \\ =204yd^2 \end{gathered}$

Now, the cost of carpeting the rectangular room is,

$\begin{gathered} C=xA \\ =25\times204 \\ =5100 \end{gathered}$

Therefore, the cost of carpeting the room with dimensions 17 yd. x 12 yd is $5100.

6 0

1 year ago

At time tequals0, water begins to drip out of a pipe into an empty bucket. After 14 minutes, there are 7 inches of water in th

Vaselesa [24]

Answer:

$w=0.5t$

Step-by-step explanation:

Given:

'w' represents inches of water left after 't' minutes of time.

The dripping out of water is a linear function.

At time 't' equal to 0, the bucket was empty.

After 14 minutes, there are 7 inches of water in the bucket.

A linear function model is of the form: $w=mt+b$

$Where, m\to\textrm{dripping rate of water}\\b\to\textrm{water level at t=0}$

Now, at $t=0,w=0(\textrm{As bucket was empty})$

At $t=14,w=7$

Therefore, plugging these values in the above linear model and solving the system of linear equations. This gives,

$0=m(0)+b\\0=0+b\\b=0\\\\7=14m+0\\m=\frac{7}{14}=0.5\ in/min$

Therefore, the values of 'm' and 'b' are 0.5 and 0 respectively.

Thus, the linear model is given as:

$w=0.5t$

4 0

3 years ago

In a bag, there is equal number of red, blue and yellow marbles. How many marbles could be in the bag?

valentinak56 [21]

Answer:

there are 30

Step-by-step explanation:

10 in each bag

6 0

3 years ago

Which of the following equations is direct variation? Y=2x,y=x+2,y=2,y=-2x-1

Andrew [12]

Answer:

y=2x

Step-by-step explanation:

Direct variation is such that y=kx where k is the rate of change. In direct variation the graph must cross the origin (0,0) meaning that the y-intercept is zero. The only equation that satisfies the definition of direct variation is y=2x.

3 0

3 years ago