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3 years ago

12

A sandwich decrease from $8 to $6 what is the percentage decrease

1 answer:

kati45 [8]3 years ago

4 0

Answer:

25%

Step-by-step explanation:

First find the difference in price= $8-$6 = $2

Now, find percentage decrease in the price of sandwich.

Percentage decrease= (difference in price/ original price) *100

= $\frac{2}{8}$ *100

= $\frac{200}{8}$

Percentage decrease=25%

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Find t24 for the sequence 100,64,28...

serious [3.7K]

Answer:-728

Step-by-step explanation:

100,64,28,....

First term(a)=100

Common difference(d)=64-100=-36

Using the formula

Tn=a+ dx(n-1)

T24=100-36(24-1)

T24=100-36x23

T24=100-828

T24=-728

8 0

3 years ago

Match the equations representing parabolas with their directrixes. y + 8 = 3(x + 2)2 y − 14 = -(x − 3)2 y + 7.5 = 2(x + 2.5)2 y

Shkiper50 [21]

Answer:

Part 1) $y+8=3(x+2)^{2}$ -----> $y=-8.08$

Part 2) $y-14=-(x-3)^{2}$ ----> $y=14.25$

Part 3) $y+7.5=2(x+2.5)^{2}$ ----> $y=-7.625$

Part 4) $y-17=-(x-3)^{2}$ -----> $y=17.25$

Part 5) $y+7=(x-4)^{2}$ ----> $y=-7.25$

Part 6) $y-6=-(x-1)^{2}$ ----> $y=6.25$

Step-by-step explanation:

we know that

The equation of a vertical parabola in vertex form is equal to

$y-k=\frac{1}{4p}(x-h)^{2}$

where

(h,k) is the vertex

The directrix is

$y=k-p$

case 1) we have

$y+8=3(x+2)^{2}$

the vertex is the point (-2,-8)

$\frac{1}{4p}=3$

$p=\frac{1}{12}$

The directrix is equal to

$y=-8-\frac{1}{12}=-8.08$

case 2) we have

$y-14=-(x-3)^{2}$

the vertex is the point (3,14)

$\frac{1}{4p}=-1$

$p=-\frac{1}{4}$

The directrix is equal to

$y=14+\frac{1}{4}=14.25$

case 3) we have

$y+7.5=2(x+2.5)^{2}$

the vertex is the point (-2.5,-7.5)

$\frac{1}{4p}=2$

$p=\frac{1}{8}$

The directrix is equal to

$y=-7.5-\frac{1}{8}=-7.625$

case 4) we have

$y-17=-(x-3)^{2}$

the vertex is the point (3,17)

$\frac{1}{4p}=-1$

$p=-\frac{1}{4}$

The directrix is equal to

$y=17+\frac{1}{4}=17.25$

case 5) we have

$y+7=(x-4)^{2}$

the vertex is the point (4,-7)

$\frac{1}{4p}=1$

$p=\frac{1}{4}$

The directrix is equal to

$y=-7-\frac{1}{4}=-7.25$

case 6) we have

$y-6=-(x-1)^{2}$

the vertex is the point (1,6)

$\frac{1}{4p}=-1$

$p=-\frac{1}{4}$

The directrix is equal to

$y=6+\frac{1}{4}=6.25$

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3 years ago

Write an equation in slope-intercept form for the following line:<br> (15,-5) and (1,-7)

ella [17]

(-14,-2)
You have to subtract the x and then the y and you get your new answer

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3 years ago

Read 2 more answers

Full working out for this question please

kvv77 [185]

Answer: B. t = 9.6tan(29°)

Step-by-step explanation:

<u>Based on the fact:</u>

$tan(x)=\frac{opposite}{adjacent}$

<u>Set x = 29 and solve:</u>

$\\\\tan(29)=\frac{t}{9.6} \\\\t=9.6*tan(29)$

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3 years ago

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