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Alchen [17]
3 years ago
13

Please answer all 3 questions iĺl give brainliest if right tysm

Mathematics
2 answers:
mariarad [96]3 years ago
8 0

Answer:

1. 500

2. 126

3. 615

Step-by-step explanation:

Area of a parallelogram formula: A = bh

20 x 25 = 500

7 x 18 = 126

20.5 x 30 = 615

ella [17]3 years ago
4 0
1. 20 x 25 = 500 m2
2. 7 x 18 = 126 in2
3. 30 x 20.5 = 615 yd2
Hope this helps
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the population of a town increases by 8% annually if the present population is 54000 what was it a year ago?
yKpoI14uk [10]

Answer:

49680

Step-by-step explanation:

Multiply 54,000 by 92%. 100%(this years population)-8%=92%

54000*0.92 = 49680, people one year ago.

8 0
3 years ago
A road is made in such a way that the center of the road is higher off the ground than the sides of the road, in order to allow
Jet001 [13]

Remark.

The problem is a bit indistinct. Where exactly are the two edges of the road? I'm going to say that they are the x intercepts, but that may not be true. Certainly it does not have to be true at all.


Graph.

A graph has been made for you. The maximum is marked for you. It is an approximation The actual height can be more accurately found.


Height

y = (-1/200)(x - 16)(x + 16)

y = (-1/200)*(x^2 - 256)


The maximum height for this graph only is when x = 0.Other graphs require completing the square.


y = (-1/200) * (-256)

y = 1.28 exactly. I thought the graph might be rounding the answer. It is not.

4 0
3 years ago
Read 2 more answers
Which pair of numbers are opposites?<br> A. 7 and –7<br> B. 4 and <br> C. 9 and <br> D. 7 and 49
NARA [144]

Answer:

A

Step-by-step explanation:

7 and -7 are the opposite on the number line

7 0
2 years ago
Read 2 more answers
A company wants to decrease their energy use by 17%. If their electric bill is currently $2500 a month, what will their bill be
expeople1 [14]
We need to find out how much 17 percent of 2,500 is, and then subtract that amount by 2,500. We can use proportions to use this. We can set up a fraction with x/2500 and another fraction with 17/100. Then, we need to cross multiply. This gives us 42,500. Next, we can divide by 100. This gives us 425. We know that they will save $425 if they decrease their energy use by 17%. We now need to subtract $425 from $2,500. This gives us $2,075. If the company is successful in decreasing their energy use by 17%, their bill would be $2,075.

8 0
3 years ago
Write the equation of a parabola whose directrix is y=9.75 and has a focus at (8, 0.25).
lana [24]

Answer:

y = (-1/19)(x - 8)² + 1521/76

Step-by-step explanation:

A parabola moves in such a way that it's distance from it's focus and directrix are always equal.

Now, we are given that directrix is y = 9.75 and focus is at (8, 0.25). Focus can be rewritten as (8, ¼) and directrix can be rewritten as y = 39/4

If we consider a point with the coordinates (x, y), it means the distance from this point to the focus is;

√((x - 8)² + (y - ¼)²)

Distance from that point to the directrix is; (y - 39/4)

Thus;

√((x - 8)² + (y - ¼)²) = (y - 39/4)

Taking the square of both sides gives;

((x - 8)² + (y - ¼)²) = (y - 39/4)²

(x - 8)² + y² - ½y + 1/16 = y² - (39/2)y + (39/4)²

Simplifying this gives;

(x - 8)² - (39/4)² = (½ - 39/2)y

(x - 8)² - 1521/4 = -19y

(x - 8)² - 1521/4 = -19y

Divide both sides by -19 to get;

y = (-1/19)(x - 8)² + 1521/76

6 0
3 years ago
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