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3 years ago

Someone help i'll give brainliest to right answer!

Mathematics

1 answer:

Bogdan [553]3 years ago

8 0

Answer:

145

Step-by-step explanation:

angles in a pentagon add up to equal 540

Hence, 110 + 90 + 80 + 115 + v = 540

( note that we just created an equation that we can use to solve for v )

We now solve for v using the equation created

110 + 90 + 80 + 115 + v = 540

step 1 combine like terms

110 + 90 + 80 + 115 = 395

we now have 395 + v = 540

step 2 subtract 395 from each side

540 - 395 = 145

395 - 395 cancels out

we're left with v = 145

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Use the x-intercept method to find all real solutions of the equation. -9x^3-7x^2-96x+36=3x^3+x^2-3x+8

Varvara68 [4.7K]

Answer:

x ≈ 0.290640965127

Step-by-step explanation:

By subtracting the right side of the equation, we get a function that is zero at a real solution for x. The only x-intercept is at approximately 0.290640965127.

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The graph shows the x-intercept to be 0.2906. The value above was obtained by Newton's method iteration. The roots of this cubic will all be irrational.

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4 years ago

Whats the slope of the line that contains (-2, -2)

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8 0

3 years ago

On Monday billy spent 4 1/4 hours studying.On Tuesday he spent another 3 5/9 hours studying what is the combined time he spent s

Amanda [17]

Answer:

$7\frac{29}{36}\ hours$

Step-by-step explanation:

Given:

Time spent on Monday (M) = $4\frac{1}{4}\ hours$

Time spent on Tuesday (T) = $3\frac{5}{9}\ hours$

Now, the total combined time spent on study is equal to the sum of the times spent on Monday and Tuesday.

So, we need to add both the times to get the combined time spent on studying.

The combined study time is given as:

Total time spent = Time spent on Monday + Time spent on Tuesday

$Total\ time=4\frac{1}{4}+3\frac{5}{9}\\\\Total\ time = \frac{4\times 4+1}{4}+\frac{3\times 9+5}{9}\\\\Total\ time = \frac{17}{4}+\frac{32}{9}\\\\\textrm{Taking LCD of 9 and 4 as 36, we get:}\\\\Total\ time = \frac{17\times 9}{4\times 9}+\frac{32\times 4}{9\times 4}\\\\Total\ time = \frac{153}{36}+\frac{128}{36}\\\\\textrm{Since the denominators are same, we add the numerators.}\\\\Total\ time = \frac{153+128}{36}\\\\Total\ time = \frac{281}{36}\ hours$

Divide 281 by 36. The quotient is the whole number part, the remainder is the numerator part and the denominator remains the same.

So, on dividing, we get 7 as quotient and 29 as remainder. So, converting to mixed fractions, we get:

$Total\ time = 7\frac{29}{36}\ hours$

Therefore, the the combined time he spent studying is $7\frac{29}{36}\ hours$

6 0

4 years ago

Please help with this 1 question! -3-||

prisoha [69]

X= 72
100/4=25
18x4=72

3 0

3 years ago

Mike forgot to replace the cap on a bottle of room freshener. The room freshener began to evaporate at the rate of 15% per day.

riadik2000 [5.3K]

Percentages are out of 100. So we'll multiply by 0.85 to represent the 15%

To find the y points on the graph we can use f(x) = $0.85^x*40$

We'll input 1-5 for x to find y:

1: $0.85^1=0.85*40=34$
2: $0.85^2=0.7225*40=28.9$
3: $0.85^3=0.614125*40=24.57$
4: $0.85^4= 0.52200625*40=20.88$
5: $0.85^5=0.443705312*40=17.75$

Therefore the answer is a graph of exponential function going down from left to right in quadrant 1 through the point 0, 40 and approaching the x-axis.

8 0

3 years ago