1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatiyna
3 years ago
13

What is the slope of the line for 3x+ 4y = 20?

Mathematics
2 answers:
lakkis [162]3 years ago
6 0

Answer:

-\frac{3}{4}

Step-by-step explanation:

Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS is the order of operation, and stands for:

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

~

First, subtract 3x from both sides of the equation:

3x (-3x) + 4y = (-3x) + 20

4y = -3x + 20

Next, divide 4 from both sides of the equation:

(4y)/4 = (-3x + 20)/4

y = (-3/4)x + 5

y = -\frac{3}{4}x + 5

~

Note the equation.

y = mx + b

y = y

m = slope = -\frac{3}{4}

x = x

b = y-intercept = 5

Aneli [31]3 years ago
5 0
Slope is -3/4
20 characters
You might be interested in
Devonte used the change of base formula to approximate log4(x+2)?
ArbitrLikvidat [17]
The formula is   logb x = logd x  / logd b

so log4 (x + 2)  =  log (x+2) / log 4

ITs A
6 0
3 years ago
Find f(-2) if f(x)=-x^3+2x^2+x-1
ser-zykov [4K]

Answer:

f(- 2) = 13

Step-by-step explanation:

To evaluate f(- 2) substitute x = - 2 into f(x)

f(- 2) = - (- 2)³ + 2(- 2)² + (- 2) - 1

        = - (- 8) + 2(4) - 2 - 1 = 8 + 8 - 2 - 1 = 13

3 0
3 years ago
Technetium-99m is used as a radioactive tracer for certain medical tests. It has a half-life of 1 day. Consider the function T w
Alinara [238K]

Answer:

The expression that represents the number of days until only 10% remains is T((d) 10 %) =100×(\frac{1}{2} )^{3.322}.

Step-by-step explanation:

The equation for half life is of the form

A = A₀×(\frac{1}{2} )^{\frac{t}{h} }.........................................................................(1)

Where

A = Final amount

A₀ = Initial amount

t = Time

h = Half life

For the equation T(d) = 100×2⁽⁻²⁾....................................(2)

We have by comparison with the equation for half life

2 ≡ \frac{t}{h}  and and the equation (2) can be written as

Percentage remaining after 2 half lives is

\frac{A}{A_0} ×100=100×(\frac{1}{2} )^{2 }

However if the half life of Technetium-99m is 6 hours then we have for one day

\frac{A}{A_0} ×100=100×(\frac{1}{2} )^{2 *2}

Therefore an expression that represents the number of days until only 10% remains is

\frac{A}{A_0} ×100=100×(\frac{1}{2} )^{\frac{d}{h}  } = 10 %

(\frac{1}{2} )^{\frac{d}{h}  } =\frac{1}{10}

= ㏑(\frac{1}{2} )^{\frac{d}{h}  }  = ㏑(\frac{1}{10})

= \frac{d}{h}×㏑(\frac{1}{2} ) = ㏑(\frac{1}{10})

\frac{d}{h} = \frac{ln(\frac{1}{10}) }{ln(\frac{1}{2} )} = 3.322

Therefore the expression for the number of days 10 % of Technetium-99m will be remaining is

T((d) 10 %) =100×(\frac{1}{2} )^{3.322}

3 0
4 years ago
Help no links plzzzz
PolarNik [594]

Answer:

7/8 of a yard of fabric

Step-by-step explanation:

Hope this helps!

5 0
3 years ago
Read 2 more answers
Round 0.349 to the nearest tenth
MatroZZZ [7]
0.349 rounded to the nearest tenth is 0.35

0.349 = 0.35
6 0
4 years ago
Read 2 more answers
Other questions:
  • What is the area of the following circle
    7·2 answers
  • In oM name a chord that lies on a secant
    5·1 answer
  • What does B equal to
    12·2 answers
  • How many triangles can be constructed with three sides measuring 11 meters, 16 meters, and 26 meters?
    12·2 answers
  • PLSSSSS HELPOLP URGENT!!!!
    6·1 answer
  • What is the product? (4x) (-3x^8) (-7x^3)
    7·2 answers
  • 1 , 3 , 6 , 10 , 15
    14·1 answer
  • -3=3w + 6 solve for w
    13·2 answers
  • Anyone understand how to solve this?
    12·2 answers
  • Mai wants to make a scale drawing of her kitchen. Her kitchen is a rectangle with length 6 m and width 2 m. She decides on a sca
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!