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kobusy [5.1K]
4 years ago
11

Can somebody pls answer these three questions pls!!!!ASAP

Mathematics
1 answer:
Y_Kistochka [10]4 years ago
7 0

Answer:

1) x=1

2) x=6

3) x=3

Step-by-step explanation:

i just did them :) good luck

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Find the third side in simplest radical form
Lerok [7]

Answer:

√53

Step-by-step explanation:

hypotenuse (h) = √89

base (b) = 6

perpendicular (p) = ?

we know by using Pythagoras theorem

p = √(h² - b²)

= √(√89)² - 6²

= √ 89 - 36

= √ 53

4 0
3 years ago
Factor by grouping (or any method): 81x^2 + 9
rusak2 [61]

Answer:

9(9x^2+1)

Step-by-step explanation:

Just factor the 9 out.

6 0
3 years ago
Read 2 more answers
there are 239 people in the first 6 rows of a movie theater if the same number of people are in the next 6 rows about how many p
AnnZ [28]
6+6=12 so if there is 239 people in the first 6 rows, the other six rows also has the same amount of people. So you add 239+239 and you got your answer, 478 people are in the first 12 rows
3 0
4 years ago
A cake is removed from an oven. The temperature, in degrees Fahrenheit, of the cake after t minutes can be modeled by the equati
Montano1993 [528]

Answer:

210°F

110 minutes

Step-by-step explanation:

Given that :

Temperature of cake t minutes after being removed from oven :

f(x)=70+140e^-0.024t

Temperature T the timee it is removed ;

At this point, the time t = 0

f(t)=70+140e^-0.024t

f(x)=70+140e^-0.024(0)

= 70 + 140(1)

= 210°F

how long will it take for the cake to reach a temperature of 80oF

80 = 70+140e^-0.024t

80 - 70 = 140*e^-0.024t

10/140 = e^-0.024t

0.0714285 = e^-0.024t

In(0.0714285) = - 0.024t

−2.639057 = - 0.024t

t = 2.639057 / 0.024

t = 109.9607

t = 110 minutes

5 0
3 years ago
Write a linear function from the given values: <br><br> f(2)=-2, f(1)=1<br><br><br> f(4)=1, f(8)=4
kap26 [50]

The slope-intercept form:

y=mx+b

m - slope

b - y-intercept

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have:

f(2)=-2\to(2,\ -2)\\f(1)=1\to(1,\ 1).

Substitute:

m=\dfrac{1-(-2)}{1-2}=\dfrac{3}{-1}=-3

Therefore we have y=-3x+b.

Substitute the coordinates of the point (1, 1) to the equation:

1=-3(1)+b

1=-3+b      <em>add 3 to both sides</em>

4=b\to b=4

<h3>Answer: y = -3x + 4</h3>

We have:

f(4)=1\to(4,\ 1)\\f(8)=4\to(8,\ 4)

Substitute:

m=\dfrac{4-1}{8-4}=\dfrac{3}{4}

Therefore we have y=\dfrac{3}{4}x+b.

Substitute the coordinates of the point (4, 1) to the equation:

1=\dfrac{3}{4}(4)+b

1=3+b      <em>subtract 3 from both sides</em>

-2=b\to b=-2

<h3>Answer: y=\dfrac{3}{4}x-2</h3>
3 0
4 years ago
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