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cupoosta [38]
3 years ago
10

The expression (3x²+x+8) + (x?- 9) is equivalent to?

Mathematics
1 answer:
Andrei [34K]3 years ago
8 0

Answer: 3x^2+2x-1

Step-by-step explanation:

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3,425,645 rounded to the nearest hundred thousand
Ivan

Answer:

3,400,000

Step-by-step explanation:

refer to attached for reference

in our case, the digit in the hundred thousands place is the number 4.

How we round this digit depends on the digit directly to the right of it (i.e the ten-thousands place).

If the digit to the right is less than 5, then leave the digit in the hundred thousands place the same and make everything else to the right zeros.

if the digit to the right is 5 or greater, then increase the digit in the hundred thousands place by 1 and then make everything else to the right zeros.

in our case, the digit to the right of the hundred thousands place is the number 2, this is less than 5, so we leave 4 the same and make everything esle to the right zero.

i.e. 3,400,000

3 0
3 years ago
An angle is bisected, forming two new angles. If the original angle had a measure of 56°, what is the measure of each new angle?
IrinaVladis [17]

Answer:

?

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please can someone answer this question quickly please<br><br> Thanks
inessss [21]

Answer:

C. 5/7

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Given: ⅓ (18x + 27) = 81 Prove: x = 12
sasho [114]

Answer:

Firstly, rewrite the equation:

⅓ (18 + 27) = 81

Substitute x for the given number of it's supposed equivalent.

In this case x = 12.

⅓ (18(12) + 27) = 81

Solve using PEMDAS and simplify what is in the parenthesis first. Then, multiply.

(18 x 12) + 27 = 243

Now, solving using PEMDAS, multiply the total of what you got that was originally in the parenthesis by ⅓ .

⅓ (243) = 81

When you multiple these number they are equivalent to 81.

81 = 81

Since the equation given, when substituted x for 12, is equivalent to 81, this proves that substituting x for 12 makes this equation true.

4 0
3 years ago
5. Patricia is on the edge of the top of a mountain and notices that a kayak on the lake is 30 meters
zhuklara [117]

The distance from the kayak to the mountain to the nearest whole number is 43 meters.

The situation will form a right angle triangle as shown below in the diagram.

<h3>Properties of a right angle triangle:</h3>
  • One of its angle is 90 degrees.
  • The sides and angle can be found by using trigonometric ratios.

The height(opposite side) of the triangle is the kayak distance from the mountain to the lake below. The distance from the kayak to the mountain is the adjacent side of the triangle.

Therefore, using trigonometric ratios,

tan 35 = opposite / adjacent

tan 35° = 30 / a

a = 30 / tan 35°

a = 30 / 0.70020753821

a = 42.8444402023

a = 42.84 meters

a ≈ 43 meters

learn more on the angle of depression: brainly.com/question/13969247?referrer=searchResults

8 0
3 years ago
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