By what number should you multiply the 1st equation to cancel the x's using the elimination method?

Can someone please answer this question please answer it correctly please show work

Zina [86]

Answer:

34) A

35) C

36) D

Step-by-step explanation:

34) The perimeter of a triangle is equal to the sum of the lengths of its sides

Sides: (6.2p + 4.5q) + (3.4p - 0.7r) + (2.9r - 4.1q)

Combine like terms (same variables)

(6.2p + 3.4p) + (4.5q - 4.1q) + (2.9r - 0.7r)

9.6p + 0.4q + 2.2r

A

35)

Time possibilities

1 hour - $3 - $5 = $-2 No

2 hours - $6 - $5 = $1 Yes

3 hours - $9 - $5 = $4 Yes

4 hours - $12 - $5 = $7 Yes

5 hours - $15 - $5 = $10 Yes

6 hours - $18 - $5 = $13 Yes

7 hours - $21 - $5 = $16 Yes

8 hours - $24 - $5 = $19 No

9 hours - $27 - $5 = $22 No

The possible hours that Ms. Barnes can park are 2 - 7 hours

The only inequality graph that represents all of these values is C

36)

Convert to improper fractions

Divide by finding the reciprocal

Convert back to a mixed number

$-1\frac{7}{9}$

D

Hope this helps :)

8 0

3 years ago

3/10 of the students in art class are painting with watercolors. 1/2 of the students are painting with oil paints. What fraction

klasskru [66]

8/10 of the students in the art class are painting.
1/2=5/10
5/10+3/10=8/10

3 0

3 years ago

Read 2 more answers

Two trains, train A and train b Weigh a total of 354 tons. Train A is heavier than train b. The difference of their weights is 3

anastassius [24]

B=(354➖314) ➗2=20
A=20➕314=334

5 0

3 years ago

The lowa Hawkeyes recorded the following

Serga [27]

Answer:

-7, -2, 0, 5, 9, 12

Step-by-step explanation:

Negative numbers are obviously less that the positive, and well from there its fairly obvious

3 0

3 years ago

How would you do a,b,c,and d

I am Lyosha [343]

a) You are told the function is quadratic, so you can write cost (c) in terms of speed (s) as

... c = k·s² + m·s + n

Filling in the given values gives three equations in k, m, and n.

$28 = k\cdot 10^2+m\cdot 10+n\\21=k\cdot 20^2+m\cdot 20+n\\16=k\cdot 30^2+m\cdot 30+n$

Subtracting each equation from the one after gives

$-7=300k+10m\\-5=500k+10m$

Subtracting the first of these equations from the second gives

$2=200k\\\\k=\dfrac{2}{200}=0.01$

Using the next previous equation, we can find m.

$-5=500\cdot 0.01+10m\\\\m=\dfrac{-10}{10}=-1$

Then from the first equation

[tex]28=100\cdot 0.01+10\cdot (-1)+n\\\\n=37[tex]

There are a variety of other ways the equation can be found or the system of equations solved. Any way you do it, you should end with

... c = 0.01s² - s + 37

b) At 150 kph, the cost is predicted to be

... c = 0.01·150² -150 +37 = 112 . . . cents/km

c) The graph shows you need to maintain speed between 40 and 60 kph to keep cost at or below 13 cents/km.

d) The graph has a minimum at 12 cents per km. This model predicts it is not possible to spend only 10 cents per km.

4 0

3 years ago