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3 years ago

Which of the following sets of values correctly completes the t-chart for the equation y = 2x2 - 1. image below

Mathematics

1 answer:

Inessa [10]3 years ago

8 0

Answer:

y=3

Step-by-step explanation:

you times 2 and 2 together and it give you 4

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Jessica Reads a story about a turtle that swam 16 feet in 24 seconds. She assumes that the time that it takes the turtle to swim

Zigmanuir [339]

Answer:

Time (secs) => distance (ft)

1 => ⅔

15 => 10

24 => 16

45 => 30

Step-by-step explanation:

Equation to represent this proportional relationship is $d = tk$ , where,

t = time

d = distance

k = constant of proportionality

To complete the table, let's find k given that the turtles swarm 16 ft (d) in 24 secs (t).

Substitute d = 16, t = 24 into the equation.

$d = tk$

$16 = 24k$

$\frac{16}{24} = k$ (division property of equality)

$\frac{2}{3} = k$

Let's complete the table by substituting the value of k and the other given value of t or d, as the case may be:

For 1 sec, let's find distance (d):

$d = tk$

$d = 1*\frac{2}{3}$

d = ⅔ ft

For 10 ft, let's find the time (t) taken:

$d = tk$

$10 = t*\frac{2}{3}$

Multiply both sides by 3

$10*3 = t*\frac{2}{3}*3$

$30 = t*2$

Divide both sides by 2

$\frac{30}{2} = \frac{t*2}{2}$

$15 = t$

t = 15 secs

For 45 secs, let's find distance (d):

$d = tk$

$d = 45*\frac{2}{3} = 15*2$

d = 30 ft

5 0

3 years ago

Melissa's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Melissa $ 5.95 per pound, and

olya-2409 [2.1K]

<span>B=89 lbs ANSWER: The mix contained 89 pounds of Type B coffee.
CHECK:
167lbs-89lbs=78 lbs She used 78 pounds of Type A coffee.
$4.35A+$5.70B=$846.60
$4.35(78)+$5.70(89)=$846.60
$339.30+$507.30=$846.60
$846.60=$846.60</span>

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2 years ago

Read 2 more answers

X + 3 = y <br><br> solve for x

alexira [117]

Subtract 3 from each side to isolate the x and you get x=y-3

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2 years ago

Write 900,000+80,000+500+7 in standard form

Gnoma [55]

900,000+80,000+500+7 is 980,507

4 0

3 years ago

Read 2 more answers

143 everyone please everyone answers this

Law Incorporation [45]

Hi I hope you are all okay could someone help me with this math question thankyou !!!

y
∝
1
√
x
If
y
=
7
when
x
=
64
find,
x
when
y
=
8

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3 years ago