Mathematics, 19.03.2021 23:20 ellamai10123

Can someone help? Thanks...

Answers: 2

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Answers

As you see, each two triangles beside each other are identical, so I will find one from each two and then add all together.
Area of triangle 1 (largest) = base x height / 2
= 7 x 9 / 2
= 63 / 2
= 31.5
Two of them = 31.5 x 2 = 63
Area of triangle 2 (smallest) = 4 x 7 / 2
= 28 / 2
= 14
Two of them = 14 x 2 = 28
Total = 28 + 63
= 91 cm^2

Answer from: eweqwoewoji

91cm2 because multiply and divide by 2 for all of the 4 sections

Answer from: Quest

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒ $x\frac{60}{100}=45$

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

$\frac{x(.6)}{(.6)}= \frac{45}{(.6)}$

⇒ x = 75

therefore 75 tickets have been sold so far.

Answer from: Quest

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.