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4 years ago

Which point is on the line y = -2x + 3? (-2, -1) (3, 3) (3, -3) (-3, -9)

1 answer:

8 0

(-2, -1) so y = -2(-2) + 3 = 7; FALSE
(3, 3) so y = -2(3) + 3 = -3; FALSE
(3, -3) so y = -2(3) + 3 = -3; TRUE
(-3, -9) so y = -2(-3) + 3 = 9; FALSE

answer
(3, -3)

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Hi can you please help me with my work

xenn [34]

A, D, and E are true

One X on the line plot marks one time something happened. So the two x’s above the 1 means that he practiced piano for one hour (see to the right that says hours next to the numbers, so 1=1 hour) two times.

45 minutes is 3/4 of an hour, and is the mark right between 1/2 and 1. There is one x above this mark, so that means Thaddeus practiced for 45 minutes one time, so B is false

Thadeus practiced piano for 30 minutes two times, so C is false because he didn’t mostly practice for thirty minutes.

D is correct because there are 2 Xs above the 0, which means two times he practiced for zero hours, which means he didn’t practice at all.

E is correct because 15 minutes is 1/4 of an hour, so it is the mark between 0 and 1/2. We see there are three x’s there, so that means he practiced for 15 minutes 3 times.

I hope this helps! Let me know if you want me to explain it differently.

4 0

3 years ago

Find the place value of 8 in 2456.1387. Tenths Hundredths Thousandths Thousands

rjkz [21]

Answer: Third Choice. Thousandths

Step-by-step explanation:

Concept:

Here, we need to know the order and name of each place value.

Please refer to the attachment below for the specified names.

Solve:

STEP ONE: Orde and name each place

2 ⇒ One Thousands

4 ⇒ Hundreds

5 ⇒ Tens

6 ⇒ Ones

1 ⇒ Tenths

3 ⇒ Hundredths

8 ⇒ One Thousandths

7 ⇒ Ten Thousandths

STEP TWO: Find the number [8] in the number

As we can see from the list above, 8 is at the right of the decimal point, thus, the place value is Thousandths.

Hope this helps!! :)

Please let me know if you have any questions

5 0

3 years ago

A plumber charges $130 2 hours of work and $235 for 5 hours of workWhat is the of change in dollars per hour

kogti [31]

Answer:

235

Step-by-step explanation:

Figure the rates per hr.

110/3 = 36 2/3

160/5 = 32.

So, the rates are not the same.

Knowing a bit about plumbers, they normally charge a basic fee to just show up, and then they charge per hr.

In cases like these, where we're asked to project to a new data point (in this case an 8-hr job), you should immediately think of a graph. The x-axis would be the hours worked. The y-axis would be the charge for the work (the cost of the job).

We're given two pairs of values:

(3,110) and (5,160).

The next step is to fit a line to them.

y = mx+b is the general equation for a line.

m = the slope = rise/run = change in y / change in x

Call the change in y, dy (for delta y).

Call the change in x, dx (for delta x).

m = dy/dx = 50/2 = 25

The slope is thus 25, which means for each hour, the price goes up by $25. That means the plumber charges $25/hr.

We also know the plumber charges $110 for a 3-hr job. 3*25 = $75. So the base charge would be $110-75 = $35.

y = 25x + 35

Checking this formula at x=3, we know it is 110.

Checking it at x=5, we obtain:

y = 25*5 + 35 = 125 + 35 = 160.

That checks.

Now to figure an 8-hr job, set x=8 and use the equation"

y = 25*8 + 35.

y = 200 + 35.

y = 235.

That means an 8-hr job costs $235.

3 0

3 years ago

Annie wants to make several plates of apples apricots, so that each plate has the same number of apples and the same number of a

Vilka [71]

Answer:

Annie can make 4 plates with $8:4=2$ apples and $20:4=5$ apricots on each plate.

Step-by-step explanation:

Annie has 8 apples and 20 apricots.

Factor these numbers:

$8=2\cdot 4=2\cdot 2\cdot 2\\ \\20=2\cdot 10=2\cdot 2\cdot 5$

Find GCF(8,20):

$GCF(8,20)=2\cdot 2=4$

Hence, Annie can make 4 plates with $8:4=2$ apples and $20:4=5$ apricots on each plate.

3 0

4 years ago

Solve the following equation for x.

makkiz [27]

Answer:

you're answer is d

Step-by-step explanation:

you make the 9 positive and add 9 to -51 and you get -42 then you divide by 6 and get -7

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4 years ago