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tamaranim1 [39]
3 years ago
5

I need help with this one

Mathematics
2 answers:
Reika [66]3 years ago
8 0

Answer:

look it up

Step-by-step explanation:

Alex3 years ago
4 0
-2(-3)^3
-2(-3^3)
2 x 27
54
y=54

But I got undefined for the last one

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The area of a rectangle is 63m^2 and the length of the rectangle is 11m more than twice the width. Find the length and width.
AleksandrR [38]

Answer:

width = 3.5 m

length = 18 m

Step-by-step explanation:

area = length x width

x is the width then length = 2x + 11

x(2x + 11) = 63

2x^2 + 11x - 63 = 0

The formula to solve a quadratic equation of the form ax^2 + bx + c = 0 is equal to x = [-b +/-√(b^2 - 4ac)]/2a

with a = 2

       b = 11

       c = -63

substitute in the formula

x = [-11 +/- √(11^2 - 4(2)(-63))]2(2)

x = [-11 +/- √(121 + 504)]/4

x = [-11 +/- √625]/4

x = (-11 +/- 25)/4

x1 = (-11 + 25)/4 = 14/4 = 3.5

x2 = (-11 - 25)/4 = -36/4 = -9

since width can't be a negative number, x is 3.5

length = 2x + 11 = 2(3.5) + 11 = 18

7 0
2 years ago
A=75(125+81/2) how do you this equation? pls Help!!!
Maru [420]
Closing parenthesis is misplaced. Should be: 
<span>A = h(b₁ + b₂)/2 </span>

<span>h = 75 ft </span>
<span>b₁ = 125 ft </span>
<span>b₂ = 81 ft </span>

<span>Then it's just plug & grind: </span>

<span>A = 75(125 + 81)/2 ft² = 75·206/2 ft² = 75·103 ft² = (7500 + 225) ft² = 7725 ft² </span>

<span>If you follow that, it will guide you through any other, similar p</span>
4 0
3 years ago
Read 2 more answers
Find the number whose 8% is 48?
Black_prince [1.1K]

Answer:

Step-by-step explanation :

Let x be the number.

x × 8/100 =48

x =48 × 100/8

Now cut 48 by 8 and we get 6.

x = 6 ×100

x =600

So 600 is the required number.

8 0
2 years ago
Use the distributive property to write an equivalent expression. 6(x+y+z)
RSB [31]

Answer: To confuzing

Step-by-step explanation:

7 0
2 years ago
At her brother’s birthday party, Lisa ate 80 pretzels, or 20% of a bag. A tape diagram. Lisa ate 20 percent out of 100 percent o
yaroslaw [1]

The correct answers are a, c, and e.

6 0
3 years ago
Read 2 more answers
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