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3 years ago

Help please this is so hard I don't understand it

Mathematics

1 answer:

Zina [86]3 years ago

5 0

Answer:

<ABC = 15

< BAC = 150

Step-by-step explanation:

<C = <B since this is an isosceles triangle. We know this because AC = AB

<C = 15 so <ABC = 15

The sum of the angles of a triangle is 180

A + B+ C = 180

A + 15+15 = 180

A +30 =180

A = 180-30

A = 150

< BAC = 150

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3 years ago

Read 2 more answers

Solve for x : x - 3(2 -x) = 4x - (x - 1) and explain please thanks

Hunter-Best [27]

Solving:
$x - 3(2-x) = 4x - (x - 1)$

Delete the first parentheses by the distributive property, with the distributive property, we multiply the '3' first, then resolve it and the second parentheses eliminate by changing the sign:
$x - 6 + 3x = 4x - x + 1$
Now, put the numbers with letter (incognito) to the right and numbers without letter to the left, changing the signal when changing sides.
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$\underline{The\:value\:of\:"x"\:is\:7}$

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4 years ago

The volume of a cylinder varies jointly as the square of the radius and the height. If the volume is 28pi cubic inches when the

nignag [31]

Answer:

1584 cu in.

Step-by-step explanation:

Since the volume varies jointly with the radius and height we have an equation V = kr^2h where k is the constant of variation

28 = 2^2(7)k = 28k

k = 1

Now V = r^2h

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3 years ago

5x(3x+2)-4(2x-1) Yea i needd help

UkoKoshka [18]

Answer: 15x² + 2x + 4

x = -2/3, 0, 1/2

Step-by-step explanation:

5x(3x + 2) - 4(2x - 1)

First, distribute:

15x² + 10x - 8x + 4

Combine like terms:

15x² + 2x + 4

This is your polynomial!

If you needed to solve for x, take your original factored polynomial and set each term equal to 0:

5x(3x + 2) - 4(2x - 1)

5x = 0

x = 0

3x + 2 = 0

3x = -2

x = -2/3

-4 = 0

No solution

2x - 1 = 0

2x = 1

x = 1/2

x = -2/3, 0, 1/2

Hope this helps!

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4 years ago

Last night Danielle had a birthday party. 1/3 of the birthday cake was leftover. She wanted to share the leftover birthday cake

Reil [10]

Answer:

1/132

Step-by-step explanation:

1/3 ÷ 44 would be solved by multiplying 1/3 and 1/44 which is 1/132

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3 years ago

Help please this is so hard I don't understand it​

Help please this is so hard I don't understand it