2 years ago

Which set of three angles could represent the interior angles of a triangle? *

1 answer:

6 0

Use the triangle angle theorem:
All interior angles of a triangle equal 180 degrees.

If you use the theorem you should get the first one 19,70,91

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What are the solutions of the quadratic equation (x + 3)(x +3) = 49? Ax = -2 and x = -16 Bx = 2 and x = -10 Cx = 4 and x = -10 D

Ivahew [28]

Answer:

4 and -10

Step-by-step explanation:

$\displaystyle (x + 3)(x +3) = 49 \\ x^2+3x+3x+9=49 \\ x^2 +6x+9=49 \\ x^2 + 6x + 9 - 49 = 0 \\x^2+6x-40=0 \\\\ \Delta=b^2-4ac \\ \Delta=6^2-4 \cdot 1 \cdot (-40) \\ \Delta=36+160 \\ \Delta=196 \\ \\ X_{1,2}=\frac{-b \pm \sqrt{\Delta} }{2a} \\ \\ X_1=\frac{-b+\sqrt{\Delta} }{2a} = \frac{-6+14}{2} = \frac{8}{2}=4 \\ \\ X_2=\frac{-b-\sqrt{\Delta} }{2a} = \frac{-6-14}{2}=\frac{-20}{2} = -10$

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3 years ago

two linear functions have the same slope,same x-intercept, and same y-intercept. Must these functions be identical? Explain your

Leviafan [203]

Yes, because only one line can go through two set points and because they have the same slope and the same x and y-intercepts they have two set points that they must both go through making them identical.

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2 years ago

Help me im stuck answer a b c and d please I don't know if they right

TEA [102]

Answer:

It’s b

Step-by-step explanation:

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2 years ago

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If celia made 3 1/2 cups of rice. A serving is 2/3cup. How many servings of rice did she make?

nadezda [96]

Answer:

ima say around 5 and 1/4 cups

Step-by-step explanation:

3 1/2 divided by 2/3 cand be round to

3 3/6 divided by 4/6 to make it easier

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2 years ago

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natali 33 [55]

Answer:

It is a singular matrix

Step-by-step explanation:

good luck to ya.

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3 years ago