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zhannawk [14.2K]
3 years ago
7

Evaluate the expression when b=-4 and x=6 . -X+7b D Х 5. ?

Mathematics
1 answer:
attashe74 [19]3 years ago
8 0
What are the options?
You might be interested in
I need help please! ​
Sophie [7]

Answer/Step-by-step explanation:

Area of trapezium = ½*(AD + BC)*AB

Area = 42 cm²

AD = (x + 8) cm

BC = (x + 5) cm

AB = x cm

Plug in the values into the equation

42 = ½((x + 8) + (x + 5))*x

42 = ½((x + 8 + x + 5)*x

42 = ½(2x + 13)*x

Multiply both sides by 2

42*2 = (2x + 13)*x

84 = 2x² + 13x

2x² + 13x = 84

Subtract both sides by 84

2x² + 13x - 84 = 0

4 0
2 years ago
2 divided by one third
Jobisdone [24]
2 / 1/3
= 2* 3/1
= 2*3
= 6
4 0
2 years ago
Read 2 more answers
Suppose 81^x = 64.What is 27^x+1?
Genrish500 [490]
What does the <span>^ mean? I feel so stupid</span>
4 0
3 years ago
The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a ru
ioda
Let width of the floor be x feet, them area is
x(x+2)  = 168
x^2 + 2x - 168 = 0
(x - 12)(x + 14) - 0
so x = 12
the floor is 12 ft by 10 ft

the width of the rug should be 10 - 2(2) = 6 feet


4 0
3 years ago
1/2e=1/4 what does equation equal
expeople1 [14]
\sf \frac{1}{2e}= \frac{1}{4} \\ \\ 2e=4 \\ \\ \boxed{\sf e=2}
3 0
2 years ago
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