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ElenaW [278]
3 years ago
7

A tree casts a shadow 20 feet long at the same time the shadow cast by a vertical 7-foot post is 12 ft long find the height of t

he tree
Mathematics
1 answer:
KonstantinChe [14]3 years ago
6 0
Set up a proportion and get x=11.67 ft
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What’s the percent of change?<br> Original: 25<br> New: 18
soldier1979 [14.2K]

28% decrease

Solution:

Calculate percentage change

from V1 = 25 to V2 = 18

(V2−V1)|V1|×100

=(18−25)|25|×100

=−725×100

=−0.28×100

=−28%change

=28%decrease

7 0
3 years ago
-3x+10y=-60<br> 3x+5y=15
Verdich [7]

Answer:

x=10, y=-3

Step-by-step explanation:

solve by addition/elimination

6 0
3 years ago
A kite has a height of 36 inches and a width of 30 inches. Explain how to use the area formula for a triangle to find the area o
mote1985 [20]

Height of the kite is = 36 inches.

Width of the kite is = 30 inches

One of the ways to find the area is to draw a vertical line to break the kite into two equal triangles. Mark the base as 36 inches and height as 15 inches .

Now we will use the formula area=\frac{1}{2}*base*height to find the area of each triangle. Then we will add both the areas to find the area of the kite.

Area of 1 triangle = \frac{1}{2}*36*15 = 270 square inches

Area of the 2nd triangle is also = 270 square inches

Hence, area of the kite = 270+270 = 540 square inches

8 0
3 years ago
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Find the sum 51/3+(22/3+11/3)
geniusboy [140]
I think the answer is 84/3
8 0
3 years ago
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Rhianna invests $1200 in stock and bonds. The stock pays 9% interest and the bonds pay 6% interest. If the total ANNUAL interest
Strike441 [17]
0.06x+0.09 (1200-x)=96
Solve for x
X=400 at 6%

1200-400=800 at 9%
3 0
3 years ago
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