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2 years ago

valid or invalid- all the ballerinas are wearing tutus. hank is not wearing a tutu, so he must not be a ballerina

Mathematics

1 answer:

Hitman42 [59]2 years ago

5 0

Invalid, just because he is not wearing a tutu does not mean he is not a ballerina

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What is the graph of fx =4[1/2]x?

Over [174]

Answer:

im pretty sure it is 2

Step-by-step explanation:

8 0

3 years ago

Solve the system by graphing. Write the solution as an ordered pair. y = 1/3x + 2 y = –x – 2

Dima020 [189]

ANSWER

The solution is where the two graphs intersect, which is
$(-3,1).$

EXPLANATION

The given system of equations are
$y = \frac{1}{3} x + 2$
and

$y = - x - 2$

We need to graph the two equations.

Let us graph

$y = \frac{1}{3} x + 2$
first.

We need at least two points.

You can choose any appropriate value for x and solve for y. Choosing zero makes our working easier. So let us plot the intercepts.

When
$x = 0$

$\Rightarrow \: y = \frac{1}{3} (0) + 2$

$\Rightarrow y = 0 + 2$

$\Rightarrow y = 2$

So this gives us the ordered pair,

$(0,2)$

When
$y = 0$
we get,

$0= \frac{1}{3} x + 2$

$\Rightarrow \: - 2 = \frac{1}{3} x$

$\Rightarrow \: - 2 \times 3= x$

$\Rightarrow \: -6= x$
This also gives the ordered pair

$(-6,0).$

We plot these two points and draw a straight line through them to obtain the blue graph in the attachment.

For the second line

$y = - x - 2$

We again find the intercepts and plot them.

When
$x = 0$

$y = - 0 - 2$

$\Rightarrow \: y = - 2$

This gives the ordered pair

$(0,-2)$

Also, when
$y = 0$

then we have,

$0 = - x - 2$

$2 = - x$

$x = - 2$

Then we again have the ordered pair,

$(-2,0)$

We plot these two points on the same graph sheet to obtain the red graph above.

The intersection of the two lines is
$(-3,1)$

You will get good grades so don't worry much.

4 0

3 years ago

My question is in the picture I tried to multiply -7 on both sides and got -147 I don't know if it's correct or if it's the righ

Mars2501 [29]

Answer:

-3

Step-by-step explanation:

-7b = 21

/ -7 / -7

b = -3

7 0

3 years ago

Read 2 more answers

I am a student in need pls help me

solmaris [256]

Answer:

2*400= 2*400*1

2*400

800

2 x 400 = 2 x 100 x 4

100 x 4

= 400

I hope this helps:

Sorry if it didn't :(

7 0

3 years ago

Read 2 more answers

The time required to do a job varies inversely as the number of people working. It takes 5hr for 7 bricklayers to build a park w

ExtremeBDS [4]

Answer

3.5 hours.

Explanation

The first step is to calculate the constant of proportionality.

t ∝ 1/n

t = k/n Where t = time, K= constant and n = number of people

t = k/n

k =tn

= 5×7 = 35

The equation becomes;

t = 35/n

for n = 10,

t = 35/10

t = 3.5 hours.

6 0

3 years ago