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3 years ago

HELP 15 POINT AND WILL MARK BRIANLYEST. Emma said that when you multiply three negative decimals, the product will be positive.

Mathematics

2 answers:

baherus [9]3 years ago

5 0

Answer:

A)Her statement is not correct because a negative times a negative is a positive but if you times it by negative again then it will be negative again not positive

B)(–3) – (–5) = (–3) + 5 = 2

c)Yes she is correct

5 – (–3) = 5 + 3 = 8

(–3) – (–5) = (–3) + 5 = 2

Step-by-step explanation:

blagie [28]3 years ago

4 0

Answer ( A
explanation: none

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Find the values of x y and z

andrey2020 [161]

9514 1404 393

Answer:

x = 18√2
y = 18√3
z = 36

Step-by-step explanation:

These "special" right triangles have side length ratios that it is useful to remember.

<u>45°-45°-90° triangle</u>

Sides have the ratios 1 : 1 : √2. That is, x is √2 times as long as the side length shown as 18.

x = 18√2

<u>30°-60°-90° triangle</u>

Shortest to longest, sides have the ratios ...

1 : √3 : 2

That is, y is √3 times the length of the side marked 18, and z is 2 times the length of the side marked 18.

y = 18√3

z = 2·18 = 36

4 0

3 years ago

Multiply. write in simplest form. 2/5 x 15/16

shtirl [24]

$\frac{3}{8}$

8 0

3 years ago

what is the area of the shaded sector of the circle if the radius is 14 ft? leave your answer in terms of pi

Strike441 [17]

Given:

Radius = 14 ft

θ = 45°

To find:

Area of the shaded sector

Solution:

Area of the sector formula:

$$\text { area of sector }=\frac{\theta}{360^{\circ}} \times \pi r^{2}$

$$=\frac{45^\circ}{360^{\circ}} \times \pi \times 14^{2}$

$$=\frac{1}{8} \times \pi \times 196$

$=24.5\pi$ ft²

The area of the shaded sector of a circle is 24.5π ft².

3 0

3 years ago

The function f(x) is a quartic function and the zeros of f(x) are -4,-3,2 and 5. Assume the leading coefficient of f(x) is 1. Wr

777dan777 [17]

Answer:
f(x) = x⁴-6x³-13x²+66x+72
Step-by-step explanation:
Factors are: (x+3)(x+1)(x-4)(x-6)
[(x+3)(x+1)][(x-4)(x-6)]
[x²+3x+x+3][x²-4x-6x+24]
(x²+4x+3)(x²-10x+24)
x⁴+4x³+3x²-10x³-40x²-30x+24x²+96x+72
f(x) = x⁴-6x³-13x²+66x+72

5 0

3 years ago

The graph of y = 1/2 x2 + 2x + 3 is shown. What are the solutions to the equation 1/2 x2 + 2x + 3 = x + 7?

kirill [66]

Answer:

Step-by-step explanation:

Let's organise our information :

the function is (1/2)x²+2x+3

we want to khow the value of x that gives us : (1/2)x²+2x+3=x+7

Now the trick is to write this expression as a quadratic equation with zero at one side :

(1/2)x²+2x+3=x+7

(1/2)x²+2x+3-x-7=0
(1/2)x²+x-4=0

Now let's solve this equation :

a= 1/2
b= 1
c= -4

Δ=1²-4*(1/2)*(-4)

= 9

So we have two solutions :

$\left \{ {{y=\frac{-1-3}{2*0.5} } \atop {x=\frac{-1+3}{2*0.5} }} \right.$

y= -4
x= 2

So the solutions are -4 and 2

3 0

4 years ago