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4 years ago

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Mathematics

1 answer:

sergejj [24]4 years ago

4 0

Answer:

The correct answer is B) y = 2x - 1

Step-by-step explanation:

To find this, first choose any two data points and find the slope. We'll use points (-2, -3) and (0, 1)

m(slope) = (y2 - y1)/(x2 -x1)

m = (1 - -3)/(0 - -2)

m = 4/2

m = 2

Now we use either point and the slope in point-slope form to get the equation.

y - y1 = m(x - x1)

y - 1 = 2(x - 0)

y - 1 = 2x

y = 2x + 1

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The sum of Ted's and Leon's ages is

olganol [36]

Answer:

Ted is 6 years old

Leon is 7 years old

Andrew is 8 years old

Step-by-step explanation:

Ted+Leon=13 ⇒T+L=13 ⇒L=13-T

Leon+Andrew=15 ⇒L+A=15 ⇒A=15-L ⇒A=15-(13-T) because Leon =13-Ted

A=2+T

Ted+Andrew=14

T+A=14 ( substitute Andrew age from A=2+T)

T+2+T=14

2T=12

<h2>T=12/2=6 (Ted is 6 years old)</h2><h2>A=2+T=2+6=8 ( Andrew is 8 years old)</h2><h2>Leon=13-T=13-6=7 ( Leons is seven years old)</h2>

check: Ted+Leon=13 ⇒ 6+7=13

Leon + Andrew=15 ⇒7+8=15

Andrew+Ted=14 ⇒ 6+8=14

7 0

3 years ago

Markus sent a chain letter to his friends, asking them to forward the letter to more friends. The relationship between the elaps

Ray Of Light [21]

Answer:

Every day, 43% percent of people are added from the total number of people who receive the email

Step-by-step explanation:

we know that

The equation of a exponential growth function is given by

$P(t)=a(1+r)^t$

where

P(t) is the total number of people who receive the email

t is the time in days

a is the initial value

r is the rate of change

we have

$P(t)=6(1.43)^t$

$a=6$ ---> initial number of people who receive the email

$(1+r)=1.43$

solve for r

$r=1.43-1\\r=0.43$

Convert to percentage

$0.43(100)=43\%$

The daily percent change in the number of people who receive the email. every day is 43%

therefore

Every day, 43% percent of people are added from the total number of people who receive the email

4 0

3 years ago

Read 2 more answers

6x-5y>35 <br> On a graph

Colt1911 [192]

Answer:

See attached photo

Step-by-step explanation:

6x-5y>35

3 0

3 years ago

What is the value of a for the exponential function in the

IrinaVladis [17]

Answer:

Step-by-step explanation:

Exponential equation:

An exponential equation has the following format:

$y = a(b)^x$

In which a is the value of y when x = 0.

In this question:

When $x = 0, y = 3$ . Thus, we have that a = 3.

3 0

3 years ago

Find the m of

zzz [600]

Both of these problems will be solved in a similar way, but with different numbers. First, we set up an equation with the values given. Then, we solve. Lastly, we plug into the original expressions to solve for the angles.

[23] ABD = 42°, DBC = 35°

(4x - 2) + (3x + 2) = 77°

4x+ 3x + 2 - 2 = 77°

4x+ 3x= 77°

7x= 77°

x= 11°

ABD = (4x - 2) = (4(11°) - 2) = 44° - 2 = 42°

DBC = (3x + 2) = (3(11°) + 2) = 33° + 2 = 35°

[24] ABD = 62°, DBC = 78°

(4x - 8) + (4x + 8) = 140°

4x + 4x + 8 - 8 = 140°

4x + 4x = 140°

8x = 140°

x = 17.5°

ABD = (4x - 8) = (4(17.5°) - 8) = 70° - 8° = 62°

DBC =(4x + 8) = (4(17.5°) + 8) = 70° + 8° = 78°

6 0

2 years ago