3 years ago

What is the expression for the calculation double 5 and then multiply by 3?

Mathematics

1 answer:

Ksivusya [100]3 years ago

4 0

(2 x 5) x 3

will be your answer for the expression

hope this helps

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The length of a rectangle is 7 meters more than four times its width if the area of the rectangle is 650 square meters, find the

mrs_skeptik [129]

Let the width be x.
Width = x
Length = 4x + 7

The area is 650 m²

x(4x + 7) = 650
4x² + 7x - 650 = 0

Using quadratic formula:
$x = \dfrac{-b \pm \sqrt{b^2 - 4ac} }{2a}$

a = 4, b = 7, c = -650

$x = \dfrac{-7 \pm \sqrt{7^2 - 4(4)(-650} }{2(4)}$

$x = 11.9 \ or\ x = -13.7 \text {(rejected, length cannot be negative)}$

Width = 11.9m
Length = 4(11.9) + 7 = 54.6m

Answer: Length = 54.6m and width = 11.9m

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3 years ago

Josh is planning a trip over the summer to New York for three nights and four days with 7 of his friends. He wants to estimate t

worty [1.4K]

Answer:

Step-by-step explanation:

7 friends plus himself = 8 persons

Round trip flight cost = &389x8= & 3112

Hotel bill = &249 x 4 rooms 3 nights = &

& 2988

Cost at Observatory desk = & 18.5 x 8= & 148

Cost at base ball viewing venue = 38 x 8 = & 148