All categories

3 years ago

С

Mathematics

2 answers:

zimovet [89]3 years ago

7 0

Answer:

Step-by-step explanation:

pantera1 [17]3 years ago

5 0

9514 1404 393

Answer:

a) CD = 5.7

b) ED = 3.05

Step-by-step explanation:

Triangle ABE is similar to triangle ACD by AA similarity. This means we can write the proportions ...

a) CD/BE = AC/AB

CD = BE(AC/AB) = 3.8(12.3/8.2)

CD = 5.7

b) ED/AD = BC/AC

ED = AD((AC -AB)/AC) = 9.15(12.3 -8.2)/12.3

ED = 3.05

You might be interested in

Which of the following statements is true about points?

daser333 [38]

The answer of the question is the answer C.

4 0

3 years ago

Small sample: During an economic downturn, companies were sampled and asked whether they were planning to increase their workfor

leva [86]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The confidence level interval is $0.016 \le C \le 0.404$

Step-by-step explanation:

The sample size is $n = 20$

The number planning to increase workforce is $x = 3$

The confidence level is $c = 98$ %

The value of proportion for a plus 4 method is

$p = \frac{x+2}{n+4}$

substituting values

$p = \frac{3+2}{20+4}$

$p =0.21$

The z-critical value at confidence level of 98% is

$z_{c}=z_{0.98} = 2.33$

This values is obtained from the standard normal table

The confidence level interval can be mathematically represented as

$C =p \ \pm z_{c} * \sqrt{\frac{p(1-p)}{n+4} }$

substituting values

$C = 0.21 \pm 2.33 * \sqrt{\frac{0.21(1- 0.21)}{20 +4} }$

$C = 0.21 \pm 0.194$

=> $0.016 \le C \le 0.404$

7 0

3 years ago

How would you write the equation with a slope of 2/3 and y-intercept of -3

Nuetrik [128]

Answer:

A) y=2/3x-3

Step-by-step explanation:

A is the answer

3 0

4 years ago

What is the equation of the axis of symmetry?

Taya2010 [7]

Answer:

x=4

Step-by-step explanation:

the axis of symmetry always divides a parabola into two even parts from the vertex.

Find the value of the vertex (4,7)

since you need a vertical line to split a parabola, the equation is (x = )

Use the x value of the vertex (4)

x=4

6 0

3 years ago

I need to know how to solve these using the box method

Basile [38]

Answer:

5. (2x-3)(3x+2)

6.(x-8)(2x-5)

7.(5x-2)(2x+1)

8.(4x+3)(x+3)

Step-by-step explanation:

example on how to solve this in not how you solve your questions

2x times x = 2x2

2x times 2 = 4x

5 times x = 5x

5 times 2 = 10

The factors are (2x + 5) and (x + 2), so 2x2 + 9x + 10 = (2x + 5) × (x + 2)

4x and 5x are interchangeable, so you could put 5x in the first row and 4x in the second row and still get the same answer.

5 0

2 years ago