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3 years ago

11

Anyone know how to do these?

1 answer:

FinnZ [79.3K]3 years ago

6 0

Your doing it just fine that's the correct way .

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Find the slope of the line that contains the points (1,-1) and (-2,8)

motikmotik

The formula for slope is (y-y1)/(x-x1).
1 = x
-1 = y
-2 = x2
8 = y2

You would plug those into the formula: (-1-(-2))/(-1-8) and that would equal to: 1/(-9).

4 0

2 years ago

It takes an ant farm 6 days to consume 3/8 of an apple. (Show all work) At that rate, in how many days will the ant farm cons

Lana71 [14]

Answer: 48 days

Step-by-step explanation:

Given

Ant takes 6 days to consume $\dfrac{3}{8}$ of an apple

Using unitary method

$6\ \text{days}\rightarrow \quad \frac{3}{8}\ \text{of an apple}\\\\1\ \text{apple takes}\rightarrow \quad \frac{8}{3}\times 6=16\ \text{days}\\\\3\ \text{apples take}\rightarrow\quad 16\times3=48\ \text{days}$

6 0

3 years ago

Multiply (x + 3)(x – 3).

lyudmila [28]

B would be correct the -3 x and 3 x cancel out

7 0

2 years ago

Read 2 more answers

i need help asap!!How far can Lance Armstrong travel if he averages 28 miles per hour for 3 hours and 45 minutes?

Murrr4er [49]

Answer:

105 Miles.

Step-by-step explanation:

The first important thing to recognize is that 45 minutes is equal to .75 of an hour. (3/4).

Now, it's a rate * time problem.

28 Miles/Hour * 3.75 hrs = 105

7 0

2 years ago

A 10-yr-old competes in gymnastics. For several competitions, she received the following "All-Around" scores: 35.5, 36.3. 36.6,

Delicious77 [7]

Answer:

The child needs a score of 37.2 to move up to the next level of the competition.

Step-by-step explanation:

The mean is the sum of all scores divided by the number of competions. So

$M = \frac{S}{T}$

In which S is the sum of all her scores and T is the number of competitions.

The child has five competions:

Which means that $T = 5$

She has to get a mean of at least 36.5, so $M = 36.5$

Her scores are: 35.5, 36.3. 36.6, and 36.9. Her last score, i am going to call x. So

$S = 35.5 + 36.3 + 36.6 + 36.9 + x = 145.3 + x$

The child needs a score of _____ to move up to the next level of the competition.

This score is x. So

$M = \frac{S}{T}$

$36.5 = \frac{145.3 + x}{5}$

$145.3 + x = 36.5*5$

$x = 37.2$

3 0

2 years ago