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Svetach [21]
3 years ago
9

A tree that is 40 feet tall casts a 30 foot shadow. At the same time another tree casts a 20 foot shadow. How tall is the second

tree?
Mathematics
2 answers:
nadya68 [22]3 years ago
6 0

Answer:26 2/3 feet

Step-by-step explanation:40/30 = 4/3

(26 2/3) / 20= 4/3

krek1111 [17]3 years ago
5 0
The other tree is 30 feet because both shadow and tree height goes down by ten
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I need help to solve this
sladkih [1.3K]

Answer:

Step-by-step explanation:

The catch is to put this into the quadratic and solve for a b and c in three equations.

x = 1

a(1)^2 + b(1) + c= 0            

a + b + c + 0                (1)

x = - 1

a(-1)^2 + b(-1) + c = 2

a - b + c = 2                 (2)

x = 2

a(2)^2 + b(2) + c = 8

4a + 2b + c = 8            (3)

===================

Add 1 and 2 together

a + b + c = 0

a - b + c = 2

2a + 2c = 2           Divide by 2

a + c = 1                       (4)  

=====================

Multiply (2) by 2

2a - 2b + 2c = 4          (5)

======================

Add (5) + (3)

2a - 2b + 2c = 4

4a + 2b + c = 8

6a + 3c = 12               (6)

=====================

Multiply (4) by 3

3a + 3c = 3                 (7)

===================

Subtract (7) from (6)

6a + 3c = 12

3a + 3c =  3

3a = 9                      Divide by 3

3a/3 = 9/3

a = 3

=============

Use (4) to find c

a + c = 1

3 + c = 1                  Subtract 3 from both sides

3-3 + c = 1-3

c = - 2

=================

Use 1 to find b

3 + b - 2 = 0          Combine 3 and -2

1 + b = 0                Subtract 1 from both sides

b = - 1              

====================

Answers

a = 3

b = - 1

c = - 2

5 0
3 years ago
If a and b are positive integers and their product is 3 times their sum,what is the value of 1 a + 1 b ?
beks73 [17]
Hello,
3 solutions:
a=0,b=0 ==>a+b=0,a*b=0a=4,b=12 ==> a+b=16, a*b=48a=6,b=6 ==>a+b=12,a*b=36


8 0
3 years ago
Jack picked 76 apples. Of these, he sold 4y apples to Juanita and 3t apples to Sylvia. If he kept the remaining apples, how many
Alex Ar [27]

Answer:

Number of apples remaining with him will be 2 when we combined both the conditions.

Step-by-step explanation:

Given;

Number of apples Jack Picked =76

Number of apples sold to Juanita = 4y

Number of apples sold to Sylvia = 3t

We need to find the Number of apples remaining with him.

Solution:

To find the Number of apples remaining with him we will Subtract Number of apples sold to Juanita and Number of apples sold to Sylvia from Number of apples Jack Picked.

framing in equation form we get;

Number of apples remaining with him = 76-4y-3t

Now Given:

Condition 1 : y ≥ 15 and t = 2

So we can assume y =16 and t =2

Number of apples remaining with him = 76-4\times16-3\times2 = 76 -64 -6 = 6

Also we can say that y =17 and t =2

Number of apples remaining with him = 76-4\times17-3\times2 = 76 -68 -6 = 2

So the Given data is Insufficient to find the Number of apples remaining with him.

Condition 2 : y = 17

Number of apples remaining with him = 76-4\times17-3t = 76 -68 -3t = 8-3t

Since value of t is not given we can say that;

Given data is insufficient to find the number of apples remaining with him.

Condition 3 : Combined i.e y = 17 and y≥ 15 t = 2

Number of apples remaining with him = 76-4\times17-3\times2 = 76 -68 -6 = 2

Hence we can say that Number of apples remaining with him will be 2 when we combined both the conditions.

7 0
3 years ago
I need help ASAP! Is it A,b,c, or d?
kotykmax [81]

Answer:

i would go for the first one but im not entirely sure

i suggest you wait to see other people's answers

4 0
3 years ago
Will give brainliest! please help!
lana [24]

Answer:

B

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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