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3 years ago

The correct answer(reported to the proper number of significant figures) to the following?

Mathematics

1 answer:

Pavel [41]3 years ago

5 0

(12.67 + 19.2)(3.99) / (1.36 + 11.366) = 31.87(3.99) / 12.726 = 127.1613 / 12.726 = 9.992

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2/-3 divided by -1 2/7 = pls explain the answer

katen-ka-za [31]

Answer:

$\frac{14}{27}$

Step-by-step explanation:

$-1\frac{2}{7} = -\frac{9}{7}$
Plug -9/7 in: $-\frac{2}{3}$ ÷ $-\frac{9}{7}$
-2/3 ÷ -9/7 = 2/3 ÷ 9/7 = 2/3 × 7/9
$\frac{2}{3}$ × $\frac{7}{9} = \frac{14}{27}$

I hope this helps!

5 0

2 years ago

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What is the value of x so the rectangles have the same area. a. 12 & X b. X-2 & 16

Ilya [14]

The area of a rectangle is L x W. We have to get the value of x first so that we can find the area of the rectangle.

To get the value of x
given:
a. 12 & X
b. X-2 & 16 
solution:
12x (x) = (8-2 ) 16
12x = 16x-32
32 = 16x-- 12x
32 = 4x
4 4
8 = x

Checking:

a. 12 & X b. X-2 & 16
Area of a rectangle = L x W Area of a rectangle = L x W
 =12 x 8 = (8-2) 16
Area of a rectangle = 96 = 6 (16)
Area of a rectangle = 96

5 0

3 years ago

I need this immediatly will give brainliest

svet-max [94.6K]

Answer:

Hello,

a square, a triangle and a diamond

Step-by-step explanation:

7 0

2 years ago

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If (x + y)^2 = 105 and x^2 + y^2 = 65, what is the value of xy?

lesya692 [45]

$\boxed { \boxed {(a + b)^2 = a^2 + 2ab + b^2}}$

$(x + y) ^2 = 105$

$x^2 + 2xy + y^2 = 105$

$x^2 + y^2 + 2xy = 105$

$\text{Given that } x^2 + y^2 = 65,$

$65 + 2xy = 105$

$2xy = 105 - 65$

$2xy = 40$

$xy = 20$

$\boxed { \boxed {\text{Answer: xy = 20}}}$

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3 years ago

Please help Determine the equation of the graph, and select the correct answer below. graph at -3,2 y = (x + 3)2 − 2

leonid [27]

Y=(x+3)2+2 witch is the second one

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3 years ago

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