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2 years ago

Help please due in 10 min

Mathematics

1 answer:

vlada-n [284]2 years ago

5 0

Answer:

I think it's 20 I think I'm not sure but try to solve it

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Help pls I got an email from school Bc I didn’t finish this and I need to finish it before next class and I have like 6 more che

denpristay [2]

Answer:

169.25 $inches^{2}$

7 0

1 year ago

A national study, that revealed a normal distribution, revealed that the average time a student spends studying statistics on a

Neporo4naja [7]

Answer:

Null hypothesis = H0 : μ = 60

Alternative hypothesis = H1 : μ < 60

Step-by-step explanation:

From the question given :

μ = 60 minutes

xbar = 44.27 minutes

s = 20.4 minutes

The alternative hypothesis is the claim ; which is to hypothesize that the average studying time is 44.27 (which is less than the population average studying time)

The null hypothesis is the initial truth and it is the opposite of the alternative hypothesis.

The hypothesis are :

H0 : μ = 60

H1 : μ < 60

5 0

2 years ago

Write the equation in vertex form and then find the vertex, focus, and directrix of a parabola with equation x=y^2+18y-2

kakasveta [241]

Answer:

Part 1) The vertex is the point (-83,-9)

Part 2) The focus is the point (-82.75,-9)

Part 3) The directrix is $x=-83.25$

Step-by-step explanation:

step 1

Find the vertex

we know that

The equation of a horizontal parabola in the standard form is equal to

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

where

p≠ 0.

(h,k) is the vertex

(h + p, k) is the focus

x=h-p is the directrix

In this problem we have

$x=y^{2} +18y-2$

Convert to standard form

$x+2=y^{2} +18y$

$x+2+81=y^{2} +18y+81$

$x+83=(y+9)^{2}$

This is a horizontal parabola open to the right

(h,k) is the point (-83,-9)

The vertex is the point (-83,-9)

step 2

we have

$x+83=(y+9)^{2}$

Find the value of p

$4p=1$

$p=1/4$

Find the focus

(h + p, k) is the focus

substitute

(-83+1/4,-9)

The focus is the point (-82.75,-9)

step 3

Find the directrix

The directrix of a horizontal parabola is

$x=h-p$

substitute

$x=-83-1/4$

$x=-83.25$

6 0

2 years ago

Simplify each expression. 20-2.32 0 18 O 11 O 60 O 2.

Vladimir [108]

Answer:

the answer for this question is 18

8 0

2 years ago

Please help i will give u a brainly

Alex777 [14]

Answer:

x=45degrees because there is 180 degrees on the straight lne and the first one is 90 degeeese and since it is split in half 90/2 is 45

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers