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3 years ago

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Which angles could form a right triangle? A. 63°, 38°, 79° B. 48°, 90°, 42° C. 50°, 50°, 80° D. 30°, 70°, 80°

1 answer:

Vitek1552 [10]3 years ago

3 0

Answer choice B. It's the only one with a right angle (90 degrees) which is the only way to form a right triangle

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Anettt [7]

The answer is D because is you add a one under the 9 you get 9/1 x 2/3 and you can just multiply straight away and get 18/3 but if you need to simplify more you get 6

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Kevin plans to put concrete on a rectangular portion of his driveway the portion is 10 feet long and 3 inches high the price of

Fudgin [204]

First we need to know the total volume of concrete used:
$V_total = \frac{cost_{total}}{cost{unit}}$
$V_total = \frac{\$72.98}{\frac{\$90}{yd^{3}}}$
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Now we can use the formula for volume of a rectangular prism:
$V=lwh$
Convert everythig to yards and substitute:
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3 years ago

One angle of a triangle measures <img src="https://tex.z-dn.net/?f=10degrees" id="TexFormula1" title="10degrees" alt="10degrees"

iVinArrow [24]

Answer:

$One\ angle: 35^o\\Second\ angle: 25^o\\Third\ angle: 120^o$

Step-by-step explanation:

Let

x ----> the measure of one angle of the triangle

y ---> the measure of the second angle

z ----> the measure of the third angle

we know that

The sum of the measure of the interior angles in any triangle must be equal to 180 degrees

$x+y+z=180^o$ -----> equation A

One angle of a triangle measures 10 degrees more than the second

$x=y+10$ ----> equation B

The measure of the third angle is twice the sum of the first two angles

$z=2(x+y)$ ---> equation C

substitute equation B in equation C

$z=2(y+10+y)$

$z=4y+20$ ----> equation D

substitute equation D and equation B in equation A

$(y+10)+y+(4y+20)=180^o$

solve for y

$6y=180-30\\6y=150\\y=25^o$

Find the value of x

$x=25+10=35^o$

Find the value of z

$z=4(25)+20=120^o$

therefore

$One\ angle: 35^o\\Second\ angle: 25^o\\Third\ angle: 120^o$

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4 years ago

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Shtirlitz [24]

Answer:

7

Step-by-step explanation:

12-7=5

or

5+7=12

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3 years ago

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lora16 [44]

Answer:

<h2>3.8x105=399</h2>

Step-by-step explanation:

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