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4 years ago

Help me I hate math and this is bad it’s on my test on Monday

Mathematics

2 answers:

mart [117]4 years ago

7 0

Answer:

Step-by-step explanation:

4^3 + 4^2 = 80

tensa zangetsu [6.8K]4 years ago

7 0

Answer and how to do it is in the picture. The ^ means exponent.

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Consider the quadratic function f(x)=−x^2+x+30

yaroslaw [1]

Answer:

The smallest xx-intercept is $x = -5$

The largest xx-intercept is $x = 6$

The yy-intercept is $y = 30$ .

Step-by-step explanation:

Given a quadratic function in the following format:

$f(x) = ax^{2} + bx + c = 0, a \neq 0$

The x-values of the x-intercepts are $x_{1}, x_{2}$ , given by the following formulas.

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

We have that:

$f(x) = -x^{2} + x + 30$

This is not in the format above. I will multiply by (-1), so we have:

$f(x) = x^{2} - x - 30$

So, $a = 1, b = -1, c = -30$

$\bigtriangleup = b^{2} - 4ac = (-1)^{2} - 4*(1)*(-30) = 1 + 120 = 121$

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a} = \frac{-(-1) + \sqrt{121}}{2(1)} = \frac{12}{2} = 6$

$x_{2} = \frac{-b + \sqrt{\bigtriangleup}}{2*a} = \frac{-(-1) - \sqrt{121}}{2(1)} = \frac{-10}{2} = -5$

This means that

The smallest xx-intercept is $x = -5$

The largest xx-intercept is $x = 6$

The y-intercept is the value of f(x) when x = 0. So

$f(x)=−x^{2}+x+30$

$f(0) = 30$

The yy-intercept is $y = 30$ .

5 0

3 years ago

Write an inequality. Then solve.<br> 9. Two less than a number is less than 9.

MatroZZZ [7]

Answer:

n-2<9

Step-by-step explanation:

9+2=11. n<11

4 0

3 years ago

Express the angle in radian measure.<br><br> 32° =

Alex73 [517]

In convert the angle in degrees to radian measure, we multiply the angle in degrees to the value pi/180. Therefore for this problem, 32 degrees must be multiplied to pi/180 in order for it to be in radians thus the answer would be 32/180 pi radians.

5 0

3 years ago

The volume of a storage pod that is shaped like a cube is 1728 cubic feet what is the surface area of the storage pod?

Fittoniya [83]

Answer:

864

Step-by-step explanation:

since the volume is 1728, the cube root of 1728 is the length of each side, which is 12. to find surface area of a cube, we find the area of one face and multiply it by 6. 12*12*6 = 864.

3 0

3 years ago

1) 2a × 2b 2) 3a × 2b × 2a 3) 2a × 4b × b 4) 3b × 2a × b 5) 3a × 2b × 2c 6) 2a × 3b × b × c 7) a × 4b × 2a × 2c 8) 3a × 3b × 3c

podryga [215]

Step-by-step explanation:

1) = 4ab

2) 12a2b

3) 8ab2

4) 6ab2

5) 12abc

6) 6ab2c

7) 16a2bc

8) 27abc

6 0

4 years ago