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4 years ago

I’m stuck on this problem help

Mathematics

1 answer:

Anika [276]4 years ago

8 0

An easy way to think of this when you solve this, is to remember that all the angles in a triangle add up to 180 degrees. Therefore, the equation would be
(3x + 10) + (2x + 10) + 45 = 180. By the way, since the angles D and B are across from each other they are congruent. Now, let’s start solving it:
(3x + 10) + (2x + 10) + 45 = 180
(5x + 20) + 45 = 180
5x + 65 = 180
5x = 115
x = 23

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Solve. 3x2 + 4x = –5 using quadratic equation ...?

cupoosta [38]

3x^2 + 4x - 5 = 0
x = [-b ±√(b^2 - 4ac)]/2a

a = 3
b = 4
c = -5

x = [-4 ±√(16 + 60)]/6
x = [-4 ±√76]/6
x = [-4 ±√(2^2 * 19)]/6
x = [-4 ±2√19]/6
x = [-2 ±√19]/3

x = [-2 + √19]/3
x = [-2 + 4.35]/3
x = 2.35/3
x = 0.78 (rounded to the nearest hundredth)

x = [-2 - ±√19]/3
x = [-2 - 4.35]/3
x = -6.35/3
x = -2.12 (rounded to the nearest hundredth)

∴ x = -2.12 , 0.78 (rounded to the nearest hundredth)

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3 years ago

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denis23 [38]

Answer:

(4 , 1 , -5)

Step-by-step explanation:

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3 years ago

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VladimirAG [237]

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3 years ago

To make the same totem pole with wood that costs y dollars Ronald would have to spend a total of $35.19. Explain which property

nikitadnepr [17]

Answer:

Part 1) Subtraction Property of Equality

Part 2) This property can be used , because addition and subtraction have inverse relationships

Step-by-step explanation:

we know that

The subtraction property of equality tells us that if we subtract from one side of an equation, we also must subtract from the other side of the equation to keep the equation the same

we have

$10.50+y=35.19$

Solve for y

Applying Subtraction Property of Equality

subtract 10.50 both sides

$10.50+y-10.50=35.19-10.50$

$y=\$24.69$

Remember that this property can be used , because addition and subtraction have inverse relationships.

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3 years ago

PLZ HELP!!! Will give brainiest if correct! Thxs!!!!!!!!

Mazyrski [523]

$\frac{1.7 \times {10}^{ - 3} }{3 \times {10}^{2} } \\ = \frac{1.7}{3} \times {10}^{ - 3 - 2} \\ = 0.56 \times {10}^{ - 5} \\ = 5.6 \times {10}^{ - 6}$

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3 years ago