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3 years ago

I need help, this problem is screwing me over

Mathematics

1 answer:

VMariaS [17]3 years ago

4 0

Answer:

C. 40.5 cm²

Step-by-step explanation:

Use the formula for the area of a trapezoid:

A = (1/2)(b1 +b2)h

The bases are the parallel sides, 4.5 cm and 9 cm. The height is the perpendicular distance between them, 6 cm. Filling in these numbers, we have ...

A = (1/2)(4.5 +9)(6) = 40.5 . . . cm²

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What is the surface area in centimeters of a cube with a side lengths of 1/8 centimeters

ipn [44]

Answer:

1/8 cm = 0.125 cm = 1.25 mm

6 * (1.25 mm)^2 = 9.375 mm^2

4 0

3 years ago

Read 2 more answers

2x²-5x-12=0 (simplify solution set)

Arada [10]

Answer:

x = 4 or x = -3/2

Step-by-step explanation:

To simplify and solve this, let's use the quadratic formula.

So the format of a quadratic equation is supposed look like this:

$ax^2+bx+c=0$

Let's find a, b, c:

a is the coefficient of x^2
b is the coefficient of x
c is the constant term

Now let's solve the equation.

Let's solve your equation step-by-step.

2x^2−5x−12=0

For this equation: a=2, b=-5, c=-12

2x^2+−5x+−12=0

Step 1: Use quadratic formula with a=2, b=-5, c=-12.

$x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

$x=\frac{-(-5)\pm\sqrt{(-5)^2-4(2)(-12)} }{2(2)}$

$x=\frac{5\pm\sqrt{121} }{4}$

$x=4$ or $x=\frac{-3}{2}$

Answer:

x = 4 or x = -3/2

7 0

2 years ago

I need help understanding how to get the answer.

const2013 [10]

Answer:

-157.87

Step-by-step explanation:

1) the rules are:

$log_a(bc)=log_ab+log_ac;$

and

$log_ab^c=c*log_ab.$

2) according to the rules above:

$log_7(yz^8)=log_7y+8log_7z=-6.19-8*18.96=-157.87.$

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2 years ago

Plsss help will mark brainliest

nataly862011 [7]

Answer:

27. 18.62

28. 200%

29. 136

30. 50

31. 12.5%

32. 750

33. 5.4

Step-by-step explanation:

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3 years ago

Complete the equation for the horizontal line that passes through (5, –7). y =

KiRa [710]

Answer:

y = - 7

Step-by-step explanation:

The equation of a horizontal line is

y = c

where c is the value of the y- coordinates the line passes through.

The line passes through (5, - 7) with y- coordinate - 7, thus

y = - 7 ← equation of horizontal line

8 0

2 years ago