All categories

3 years ago

Answer? 225 or 300?

Mathematics

1 answer:

saveliy_v [14]3 years ago

6 0

-7(x+y=525)-7
3x+7y=2775

-7x-7y=-3675
3x+7y=2775

-4x=-900
X=-900/-4
X=225
Answer is c

You might be interested in

I need 3 questions answered please.

kakasveta [241]

Answer:

$3) \: \: 113 {ft}^{2}$

$4) \: false$

$5) \: 70 {ft}^{2}$

Step-by-step explanation:

3) Area of a circle is

$\pi \times {r}^{2}$

Where r = 6

Thus,

$area = \frac{22}{7} \times {6}^{2}$

$area = \frac{22}{7} \times 36$

$area = 3.143 \times 36$

$area = 113 {ft}^{2} \: (nearest \: whole \: number)$

4) False

Area of a circle is measured by the formula below:

$area = \pi \times {r}^{2}$

5) The formula for calculating the area of a rectangle is given thus:

$area \: of \: a \: rectangle = l \times w$

Where, l = 10ft; w = 7ft

$area = 10ft \times 7ft = 70 {ft}^{2}$

8 0

4 years ago

What is the slope of (-18,-20),(-18, -15)

Rzqust [24]

Answer:

Undefined.

Step-by-step explanation:

$m = \frac{rise}{run}$

$m = \frac{ - 15 - ( - 20)}{ - 18 - ( - 18)} \\ m = \frac{ - 15 + 20}{ - 18 + 18} \\ m = \frac{5}{0}$

The denominator is 0. Therefore, the slope is undefined.

4 0

3 years ago

Anne is planting a garden she is putting up a fence. The fence is 12.4 metres long and

Dmitrij [34]

To find the perimeter you do length + width so you do 12.4 + 5.9 to get the perimeter.

5 0

3 years ago

Read 2 more answers

Soni has 196 pencils. if she puts equal amounts of pencils into eight boxes,she has four pencils left.How many pencils does she

Alexandra [31]

24 pencils in each box...

you would take 196 and minus it by 4 which is 192, then divide 192 by 8, which will give you 24 then 4 left over pencils

5 0

3 years ago

I need help with questions 1,2, and 3. Would gratefully appreciate it (:

motikmotik

Answer:

Step-by-step explanation:

(2):

First let's organise the data:

33 miles ... x mph ... 4h - downstream

33 miles ... y mph ... 7h - up the stream

x = 33/4 = 8.25 mph

y = 33/7 = 4.71 mph

(3)

P(x) = $x^2 - 2x - 3$

To find the amount of key rings sold when the profit is 5000$ we have to equate P(x) with 5, because in the problem the profit of the key rings is displayed in terms of thousands.

$x^2 - 2x - 3 = 5\\x^2 - 2x - 8 = 0\\x_1 = 4, x_2 = -2$

Since the number of keyrings sold has to be positive the only answer is 4 thousand key rings.

3 0

4 years ago