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3 years ago

Tryyyyy hardddddd!!!!!!!!!!

Mathematics

2 answers:

Greeley [361]3 years ago

7 0

Answer:

Step-by-step explanation:

980

aalyn [17]3 years ago

4 0

8,700 books had minor damage

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Dawson practices soccer for 30 minutes each weekday the expression 30x can be used to find the total number of minutes Dawson ha

Mandarinka [93]

Answer:

How many days he practiced I would assume.

Step-by-step explanation:

As an example lets say he practiced for 3 days then it would be 30(3) and that would add up to 90 mins, so yea how ever many days he practiced is X.

x=days practiced

6 0

3 years ago

Find the area of a floor that measures 12.75ft. by 10.5ft.

babymother [125]

Answer:133.875ft^2

Step-by-step explanation:

Area=length×breadth

Area=12.75×10.5

Area=133.875ft^2

5 0

4 years ago

How to find missing endpoint?

Ainat [17]

You can determine the distance between the known 'endpoint' to the 'midpoint' then work the same change on midpoint

8 0

3 years ago

Read 2 more answers

20 points, please answer quickly.

erica [24]

Measurement of angle 2 = 34 degrees

Here angle 2 and 4 are vertically opposite angles

Vertically opposite angles are always equal.

In the given figure 1 and 3 are vertically opposite angle . Also 2 and 4 are vertically opposite angles. So they are same

angle 2 = angle 4

∠2 = ∠4

34=∠4

Angle 4 = 34 degrees

4 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

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

5 0

3 years ago