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3 years ago

Simplify (-5/7)÷(-1/2) show work

Mathematics

1 answer:

anastassius [24]3 years ago

3 0

Answer:

$\frac{10}{7} \: or \: 1 \frac{3}{7}$

Step-by-step explanation:

$- \frac{5}{7} \div - \frac{1}{2} = - \frac{5}{7} \times - \frac{2}{1}$

First you reciprocate the fractions and change the division sign to multiplication.

$- 5 \times - 2 = 10 \: and \: 7 \times 1 = 7$

Therefore the answer is:

$\frac{10}{7}$

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WHATS X AND Y?? Y = 3x+ 4 and 2x – 4y = -6

Georgia [21]

Answer:

X=-1, y=1

Step-by-step explanation:

Substitute value of y in first equation (3x+4) with y of second equation.

2x-4(3x+4)=-6

2x-12x-16=-6

-10x=10x=-1

solve for y but putting -1 for x value in either equation

y=3(-1)+4

y=-3+4

y=1

4 0

3 years ago

If 6/10 = 21/K what is K

timama [110]

You can cross multiply for this problem. So:

$\frac{6}{10}=\frac{21}{K}\\6K=210\\K=35$

So K=35!

Hope this helps! :)

3 0

3 years ago

I need the answers ASAP

avanturin [10]

1. f(-6)=12

2. k(-4)=-68

Further explanation:

We have two functions whose values we have to find on certain points.

In order to find the values of function, the value is put in place of variable in the function.

So,

1. f(a) = -2a

We have to find, f(-6)

So putting -6 in function

$f(-6) = -2(-6)\\= 12$

2. k(x) = -3x^2+5x

We have to find, k(-4)

So putting -4 in function

$k(-4)=-3(-4)^2+5(-4)\\=(-3)(16)-20\\=-48-20\\=-68$

Keywords: Functions, values of functions

Learn more about functions at:

#LearnwithBrainly

4 0

3 years ago

HELP me with These questions 2

LUCKY_DIMON [66]

Answer: 4

Step-by-step explanation:

A = $\frac{1}{2}$ r²θ

50 = $\frac{1}{2}$ (5)²θ

100 = (5)²θ

100 = (25)θ

4 = θ

********************************************************************************

Answer: 1570.80 cm²

Step-by-step explanation:

A = $\frac{1}{2}$ r²θ

A = $\frac{1}{2}$ (100)² $(\frac{\pi}{10})$

A = 500π

A = 1570.80

********************************************************************************

Answer: 19.63 m²

Step-by-step explanation:

A = $\frac{1}{2}$ r²θ

= $\frac{1}{2}$ (5)² $(\frac{\pi} {2})$

= $\frac{25\pi} {4}$

= 19.63

********************************************************************************

Answer: 15°

Step-by-step explanation:

$\frac{\pi }{180} = \frac{\pi} {12x}$

180 = 12x

15 = x

********************************************************************************

Answer: A

Step-by-step explanation:

Quadrant I: 0° - 90°

Quadrant II: 90° - 180°

Quadrant III: 180° - 270°

Quadrant IV: 270° - 360°

255° is in Quadrant III

5 0

3 years ago

Suppose the function of h is defined, for all real numbers as follows: (f) x = -3 if x is <) 3 if x is =0 -2 if x is > 0

V125BC [204]

Answer:

See explanation

Step-by-step explanation:

The question is not properly presented; I will answer this with the following similar question.

$h(x) = -\frac{1}{3}x^2 + 4$ --- $x \ne 2$

$h(x) = -4$ --- $x= 2$

Required

$h(-5)\ \&\ h(2)$

Calculating h(-5)

This implies that: x = -5

$-5 \ne 2$

So, we make use of:

$h(x) = -\frac{1}{3}x^2 + 4$

Substitute -5 for x

$h(-5) = -\frac{1}{3} * (-5)^2 + 4$

$h(-5) = -\frac{1}{3} * 25 + 4$

$h(-5) = -\frac{25}{3} + 4$

Take LCM

$h(-5) = \frac{-25+12}{3}$

$h(-5) = -\frac{13}{3}$

Calculating h(2)

This implies that: x = 2

$2 = 2$

So, we make use of:

$h(x) = -4$

Substitute 2 for x

$h(2) = -4$

Use the above explanation to answer your question

3 0

3 years ago