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Nutka1998 [239]
3 years ago
9

Find the area. ( height equals 4 )

Mathematics
2 answers:
iris [78.8K]3 years ago
5 0
The answer is 840 inches
krek1111 [17]3 years ago
3 0

Answer:

The area of the trapezoid is A = 24 in^2

Step-by-step explanation:

<u>Step:-1</u>

Area of the trapezoid formula is A = \frac{1}{2} (b_{1}+ b_{2} )h

here b_{1} is called the first base of trapezoid

b_{2} is called the second base of trapezoid

given height (h) = 4

<u>Step 2</u>:-

By using formula and substitute given values

A = \frac{1}{2}(7+5)(4)

A = 24 in^2

The area of the trapezoid is A = 24 in^2

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Alice's average mark for 4 Science exams is 68%. Can Alice score enough marks in a fifth exam so that her average mark increases
Keith_Richards [23]

Answer:

It is not possible for Alice to score an average of 75% because what she needs to score in the fifth exam exceeds the maximum possible score.

Step-by-step explanation:

She scored an average 68% in all 4 exams.

This means; (68% + 68% + 68% + 68%)/4

Now, a fifth exam is added and we want to know if her average can now be 75%.

Thus, let the score in the 5th exam be x and we now have;

(68% + 68% + 68% + 68% + x)/5 = 75%

Multiply both sides by 5 to get;

(68% + 68% + 68% + 68% + x) = 375%

272% + x = 375%

x = 375% - 272%

x = 103%

The maximum score is 100% and therefore it is impossible for her to score 103%. Therefore it is not possible for Alice to score an average of 75%

7 0
3 years ago
A set W of strings of symbols is defined recursively by 1. a, b, and c belong to W. 2. If x belongs to W, so does a(x)c. Which o
Vadim26 [7]

Answer:

a. a(b)c  

b. a(a(b)c)c  

d. a(a(a(a)c)c)c          

Step-by-step explanation:

We are given the following in the question:

a,b,c \in W\\\text{If } x \in W \Rightarrow a(x)c \in W

a. a(b)c

It is given b belongs to W.

b \in W\\\Rightarrow a(b)c \in W

b. a(a(b)c)c

a(b)c \in W\\\Rightarrow a(a(b)c)c \in W

c. a(abc)c

a(abc)c does not belong to W because we cannot find x in W such that a(abc)c belongs to W.

d. a(a(a(a)c)c)c

a \in W\\\Rightarrow a(a)c \in W\\\Rightarrow a(a(a)c)c \in W\\\Rightarrow a(a(a(a)c)c)c

e. a(aacc)c

a(aacc)c does not belong to W because we cannot find x in W such that a(aacc)c belongs to W.

8 0
3 years ago
Please help! due tomorrow
Soloha48 [4]
6v +12 -5v=v +12.
4b +32+2= 4b+34
like that?
5 0
3 years ago
Read 2 more answers
Can you please help please please help me with this question please
Igoryamba

Answer:

9.99

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
William is 3 years older than Charmaine.The sum of 3 times charmaines age and 2 times Williams age is 76.How old are William and
astra-53 [7]
Charmaine= x
William=x+3
3 times Charmaine = 3x
2times William = 2x+6
5x+6=76
5x=76-6
5x=70
X=14
Charmaine is 14
William is 3 years older so is 17

Check:
17x2= 34
14x3=42
34+42=76

So Charmaine is 14
William is 17
4 0
3 years ago
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