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3 years ago

A trangle has a 30 angle and a 55angle .what is the other angle ？how do you know？

Mathematics

1 answer:

algol [13]3 years ago

5 0

Answer:

95°

Step-by-step explanation:

Sum of 3 angles of a triangle equals to 180°

Here we have angles of 30° and 55°, so the remaining angle is:

180° -(30° + 55°) = 95°

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Evaluate the expression when y=-7. y? +4y-1

Delicious77 [7]

Answer:

Step-by-step explanation:

y^2+4y-1=(-7)^2+4(-7)-1=(-7)(-7)-28-1=49-28-1=21-1=20

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3 years ago

What's 1/6 divided by 3

erma4kov [3.2K]

Answer:

1/18

Step-by-step explanation:

1/6 * 1/3

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3 years ago

Read 2 more answers

A cuboid with a volume of 924cm^3 has dimensions 4cm, (x+1)cm and (x+11). Show clearly that x^2+12x-220=0 solve the equation by

garik1379 [7]

Answer:

$x^2+12x-220=0$ -- Proved

$x = 10\ \ \ x = -22$

Step-by-step explanation:

Given

$Volume = 924cm^3$

$Dimension: 4cm; (x+1)cm; (x+11)cm$

Required

Show that $x^2+12x-220=0$

The volume is calculated as:

$4 * (x + 1) * (x + 11) = 924$

Open the brackets

$(4x + 4) * (x + 11) = 924$

$4x^2 + 44x + 4x + 44 = 924$

$4x^2 + 48x+ 44 = 924$

Collect Like Terms

$4x^2 + 48x+ 44 - 924=0$

$4x^2 + 48x -880=0$

Divide through by 4

$\frac{4x^2}{4} + \frac{48x}{4} -\frac{880}{4}=0$

$x^2+12x-220=0$

Solving further:

Expand the expression

$x^2 + 22x - 10x - 220 = 0$

Factorize:

$x(x + 22) - 10(x + 22) = 0$

$(x - 10)(x + 22) = 0$

Split:

$x - 10 = 0;\ \ \ x + 22 = 0$

$x = 10\ \ \ x = -22$

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2 years ago

Draw 2 lines to cut each triangle into the given shapes. 1 pentagon and 2 triangles

vlada-n [284]

Answer:

cut the two lines at the corner, don't let the lines touch

Step-by-step explanation:

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3 years ago

Give an example of an addition problem in which you would and would not group the addenda differently to add

Ann [662]

Pemdas if you don't know what they are it looks like this.. (4+5)-5+4
similar to that.....
I am pretty sure you wouldn't add that in a agenda because of the different properties it has but there are plenty more ways i just haven't figured them out

8 0

3 years ago

A trangle has a 30 angle and a 55angle .what is the other angle ？how do you know？​

A trangle has a 30 angle and a 55angle .what is the other angle ？how do you know？