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BaLLatris [955]
3 years ago
7

Ms. Pacheco wrote the following expression. [7 x (4 + 11)] - 9 What is the value of the expression?

Mathematics
1 answer:
storchak [24]3 years ago
3 0

Answer: 105x-9

Step-by-step explanation:

Sorry love don’t feel like typing the explanation! :(

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Yiur ams zoebd 46 btah
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3 years ago
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The diagram shows a 9cm x 7cm rectangle-based pyramid. all the diagonal sides - TA, TB, TC, AND TD- are length 12cm. M is the mi
lakkis [162]

Answer:

∠TAC is approximately equal to 61.6°

Step-by-step explanation:

The given parameters for the pyramid are;

The dimension for the rectangular base are; Length = 9 cm, width = 7 cm

The length of the diagonal sides, TA, TB, TC, and TD = 12 cm each

The midpoint of the rectangular base = Point M

The diagonal AC = AM + MC

AM = MC as given M is the midpoint of the rectangular base

∴ AC = AM + MC = 2·AM

By Pythagoras' theorem, AC = √(9² + 7²) = √130

AC = √130 cm

∴ AM = AC/2 = (√130)/2 cm

Alternatively, AM = √((9/2 cm)² + (7/2 cm)²) = √(32.5) cm

∠TAC = ∠TAM

By trigonometric ratios, we have;

cos (\theta) = \dfrac{Length \ of \ adjacent \ side \ to \ angle }{Length \ of \ hypotenuse\ side \ to \ angle}

\therefore cos (\angle TAM) = cos (\angle TAC) =  \dfrac{\left (\dfrac{\sqrt{130} }{2}   \right )}{12} = \dfrac{\sqrt{130} }{2 \times 12} = \dfrac{\sqrt{130} }{24}

\angle TAC = arccos \left ( \dfrac{\sqrt{130} }{24} \right ) \approx  61.6 ^{\circ} \ to 1 \ decimal \ place

6 0
2 years ago
What is the inverse of -2
Aleksandr [31]

<u>Solution</u>:

The <em>multiplicative inverse</em> of (-2) is -1/2 <em>{Reciprocal}</em>.

The <em>additive inverse</em> of (-2) is 2.

6 0
3 years ago
Determine if √4 is rational or irrational and give a reason for your answer.
Anika [276]

Answer:

rational

Step-by-step explanation:

Because if you take the square root of 4 you get 2

if it was irrational then it would be a decimal or fraction

(plz mark braillist)

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Radda [10]

Answer:

can't understand

Step-by-step explanation:

pls try your best

3 0
3 years ago
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