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3 years ago

What’s the multiple of 9 that adds to 18

Mathematics

2 answers:

marshall27 [118]3 years ago

8 0

Answer:

Step-by-step explanation:

2x9=18

Yuri [45]3 years ago

6 0

The multiple of 9 that adds to 18 is 2.

9 x 2 = 18.

Hope this helps,

Davinia.

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Determine if triangle ABC with coordinates A (0, 2), B (2, 5), and C (−1, 7) is an isosceles triangle. Use evidence to support y

kirill115 [55]

Answer:

The triangle ABC is an isosceles right triangle

Step-by-step explanation:

we have

The coordinates of triangle ABC are

A (0, 2), B (2, 5), and C (−1, 7)

we know that

An isosceles triangle has two equal sides and two equal internal angles

The formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

step 1

Find the distance AB

substitute in the formula

$d=\sqrt{(5-2)^{2}+(2-0)^{2}}$

$d=\sqrt{(3)^{2}+(2)^{2}}$

$dAB=\sqrt{13}\ units$

step 2

Find the distance BC

substitute in the formula

$d=\sqrt{(7-5)^{2}+(-1-2)^{2}}$

$d=\sqrt{(2)^{2}+(-3)^{2}}$

$dBC=\sqrt{13}\ units$

step 3

Find the distance AC

substitute in the formula

$d=\sqrt{(7-2)^{2}+(-1-0)^{2}}$

$d=\sqrt{(5)^{2}+(-1)^{2}}$

$dAC=\sqrt{26}\ units$

step 4

Compare the length sides

$dAB=\sqrt{13}\ units$

$dBC=\sqrt{13}\ units$

$dAC=\sqrt{26}\ units$

$dAB=dBC$

therefore

Is an isosceles triangle

Applying the Pythagoras Theorem

$(AC)^{2} =(AB)^{2}+(BC)^{2}$

substitute

$(\sqrt{26})^{2} =(\sqrt{13})^{2}+(\sqrt{13})^{2}$

$26=13+13$

$26=26$ -----> is true

therefore

Is an isosceles right triangle

8 0

3 years ago

Adam is subtracting 708 – 10 mentally. He thinks

solong [7]

Adam is correct because when the hundreds and tens digit changes in 708, that means that the 7 and 0 will change into 6 and 9

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rewona [7]

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3 years ago

A circular tablecloth has a radius of 3.5 feet. Lyle is sewing a piece of ribbon around the edge of the tablecloth. If Lyle has

HACTEHA [7]

Answer:

22ft

Step-by-step explanation:

Length or ribbon = Circumference of the circle

C = 2πr

C = 2π(3.5)

C = 21.99

4 0

3 years ago

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What’s the equation of (6,39) and (-5,-49)

blondinia [14]

Y= 8x-9, because I need more characters

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