3 years ago

Is -10.5 a rational number?

Mathematics

1 answer:

sladkih [1.3K]3 years ago

5 0

Yes it is a rational number it can be expressed as a fraction

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If the volume of the pyramid shown is 108 inches cubed, what is the area of its base? A pyramid with a height of 8 inches. 4 inc

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Answer:

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3 years ago

Solve this equation<br> ×(2)-8×+7=0<br> Solve the equation

yKpoI14uk [10]

Answer:

-7/6

Step-by-step explanation:

2x-8x+7=0

combine like terms

6x+7=0

subtract the 7 from both sides

6x=-7

divide 6 from both sides

-7/6 or -1 and 2/3

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3 years ago

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1] If 221ₓ= 25₁₀ find X<br> 2] if 3ₓ + 34ₓ - 40ₓ = 0 find x<br> 3] if 23ₓ = 1111₂ find x

Olin [163]

$2\cdot x^2+2\cdot x^1+1\cdot x^0=25\\2x^2+2x+1=25\\2x^2+2x-24=0\\x^2+x-12=0\\x^2+4x-3x-12=0\\x(x+4)-3(x+4)=0\\(x-3)(x+4)=0\\x=3 \vee x=-4$

The base can't be negative, therefore $x=3$ .

$3\cdot x^0+3\cdot x^1+4\cdot x^0-4\cdot x^1+0\cdot x^0=0\\3+3x+4-4x=0\\x=7$

$2\cdot x^1+3\cdotx^0=1\cdot 2^3+1\cdot2^2+1\cdot2^1+1\cdot2^0\\2x+1=8+4+2+1\\2x=14\\x=7$

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1 year ago

The length of rectangular field is 7 m less than 4 times the width. The perimeter is 136 m. Find the width and length

Elena-2011 [213]

P = 2(L + W)
P = 136
L = 4W - 7

136 = 2(4W - 7 + W)
136 = 2(5W - 7)
136 = 10W - 14
136 + 14 = 10W
150 = 10W
150/10 = W
15 = W <=== width is 15 m

L = 4W - 7
L = 4(15) - 7
L = 60 - 7
L = 53 <== length is 53 m

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3 years ago

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I need help please....

Semmy [17]

Answer:x=-7

Step-by-step explanation:

5 0

2 years ago

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