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3 years ago

Help me didn’t have enough

Mathematics

1 answer:

kobusy [5.1K]3 years ago

4 0

Answer:

h=0.344

Step-by-step explanation:

4.52-5h=2.8

Subtract 4.52 from both sides

-5h=-1.72

Divide -5 from both sides

h=0.344

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Question 3 ! Please! I need help

Ymorist [56]

To construct a perpendicular bisector you set the compass to a span which is greater than half the length of the given line. Then setting the point at one end of the line construct an arc passing through the line . Then repeat this process from the other side of the line keeping the compass at the same setting.

Now draw the perpendicular bisector through the 2 intersections of the arcs. That's it.

3 0

3 years ago

Sami's bank account earns 4% simple interest per year. If Sami deposits $500, how much simple interest will she earn in four yea

Oksanka [162]

Answer:

Step-by-step explanation:

1% of 500 is 5

5*4(amount of years) = £20

3 0

3 years ago

An investment website can tell what devices are used to access their site. The site managers wonder whether they should enhance

lbvjy [14]

Answer: a) Unimodal and symmetric

b) 0.26

c) 0.038

Step-by-step explanation:

Given: Sample size of investors (n)= 131

True proportion of smartphone users(p) =26%

a) Since sampling distribution for the sample proportion is approximately normal when n is larger.

Normal distribution is Unimodal and symmetric.

So correct option : Unimodal and symmetric

b) mean of this sampling distribution = p = 0.26

c) standard deviation of the samplingdistribution = $\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.26\times (1-0.26)}{131}}=\sqrt{0.00146870229008}$

$=0.0383236518364\approx0.038$

6 0

3 years ago

Anyone able to help with this question?

ELEN [110]

Answer:

This is trigonomentry

Use SOHCAHTOA

where :

s is sin

c is cos

t is tan

o is opposite (side)

h is hypotenuse (opposite of 90 degree angle)

and a is adjacent (side)

Sin = o/h

cos = a/h

tan = o/a

in this case we are looking for side BC which is the hypotenuse(h)

and we have the side adjacent(a) to angle 71

since we have a and h determine what to use SIN, COS, OR TAN?

we should use Cos

they‘ve given the angle so we should do this...

Cos71 = $\frac{6.3}{h}$

Cos71 = $\frac{6.3}{BC}$

now apply algebra...

6.3/cos71= BC

BC= 19.3507869666

BC = 19.4 (3SF)

8 0

3 years ago

1. f(x) = x2 - 21<br> f(5)

matrenka [14]

Answer:

x=13

Step-by-step explanation:

if you will substitute the value of f(x) with 5, you will get the following equation:

5=2x-21

2x=26/÷2

x=13

(I didn't know what you ment when you wrote x2, is it x square or 2X)

I really hope it was the second one, cause that's how I solved it.

8 0

3 years ago