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2 years ago

Suppose to travel 162 miles in 3 hours .use the formula d=st to find the average speed

Mathematics

2 answers:

Umnica [9.8K]2 years ago

6 0

Distance = Speed x time = 162 x 3 = 486 miles/hour

Answer: 486 miles/hour

Vladimir79 [104]2 years ago

4 0

Reduce:

162 miles

--------------- = 54 mph

3 hrs

If we start with distance = rate times time, we can solve for rate:

rate = distance / time. That's what I've just done (above).

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The length of a room is 4 feet less than twice its width. The perimeter of

AlladinOne [14]

L=2W-4

PERIMETER=2L+2W

58=2(2W-4)+2W

58=4W-8+2W

58=6W-8

6W=58+8

6W=66

W=66/6

W=11 ANS. FOR THE WIDTH.

L=2*11-4

L=22-4

L=18 ANS. FOR THE LENGTH.

PROOF:

58=2*18=2*11

58=36+22

58=58

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3 years ago

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Andreas93 [3]

51450 divided by 98
is 525 with remainder 0

0 0 5 2 5
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3 years ago

A dressmaker needs to cut 18-inch pieces of ribbon from rolls of ribbon that are 6 feet in length. How many 18-inch pieces can t

TiliK225 [7]

Answer: 20 pieces, 72 inches of ribbon

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4 0

1 year ago

What is the value of x and y?

kramer

Angles in a triangle add up to 180 degrees.

All angles in an equilateral triangle have equal values

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2 years ago

(3x+2)∧2=9 how do i solve this in the square root property

Irina18 [472]

$(3x+2)^2=9 \\\\9x^2+12x+4-9=0\\\\9x^2+12x-5=0\\\\a=9,\ \ b=12, \ \ c=-5$

$x_{1}=\frac{-b-\sqrt{b^2-4ac}}{2a}=\frac{-12-\sqrt{12^2-4 \cdot9 \cdot (-5)}}{2 \cdot 9}=\frac{-12-\sqrt{144+180}}{18}=\\\\=\frac{-12-\sqrt{324}}{18}=\frac{-12-18}{18}=\frac{-30}{18}=-\frac{5}{3}\\\\x_{2}=\frac{-b+\sqrt{b^2-4ac}}{2a}=\frac{-12+\sqrt{12^2-4 \cdot9 \cdot (-5)}}{2 \cdot 9}=\frac{-12+18}{18}=\frac{6}{18}=\frac{1}{3} \\\\Answer: \ x=-\frac{5}{3}\ \ and \ \ x=\frac{1}{3}$

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3 years ago