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3 years ago

Help me please thank youu

Mathematics

1 answer:

prohojiy [21]3 years ago

3 0

Answer:

Step-by-step explanation:

The x- coordinate of each point ( the domain ) maps to exactly 1 unique y- coordinate ( the range).

This means the situation given represents a function → A

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Find the slope of the line containing points (1,3) (-3,-8)

Dmitry_Shevchenko [17]

Y=mx+c
1/-3=m3/8+c
m= 11/4

4 0

3 years ago

Can anyone solve this question??? plss plsss its my request to all if any one can solve this question I will mark him/ her the b

almond37 [142]

Answer:

a) ∠EAB = 180° - 90° - 30° = 60°

∠EBA = 180° - 90° - 60° = 30°

a) ∠EBA = 30°

b) ∠DCA = 180° - 90° - 30° = 60°

∠EBA ≅ ∠DAC, ∠EAB ≅ ∠DCA, ∠AEB ≅ ∠CDA

ΔEBA ≅ ΔDAC because of the AAA postulate

c) EB ≅ DA, EA ≅ DC, AB ≅ CA

d) AB = CA given

sin ∠EAB = EB/AB (sin 60°) EB = (0.8660)AB

cos ∠EAB = EA/AB (cos 60°) EA = (0.5)AB

cos ∠DAC = AD/CA (cos 30°) AD = (0.8660)CA

sin ∠DAC = CD/CA (sin 30°) CD = (0.5)CA

ED = EA + AD

ED = (0.5)AB + (0.8660)CA

since AB = CA, ED = 1.366CA

since EB = (0.8660)AB and AB = CA, then EB = 0.866CA

since CD = 0.5CA,

EB + CD = 0.866CA + 0.5CA = 1.366CA

EB + CD = 1.366CA

1.366CA = 1.366CA

Proof: ED = EB + CD

7 0

3 years ago

The ratio of boys to girls in the Science Club is 3.5. If there are 60 girls, how many boys are there?

liubo4ka [24]

Answer:

36 boys

Step-by-step explanation:

Please write the ratio as 3:5 or as --------

Note that 3 + 5 = 8, so that the fraction of boys in the club is 3/8 and that of girls is 5/8.

How many are in the club altogether? Let this count be represented by c. Then (5/8)c = 60.

Multiplying both sides of this equation by (8/5), to isolate c, we get:

c = (8/5)(60) = 96. Thus, there are 96 Science students altogether.

3/8 of this number are boys. This comes out to (3/8)(96) = 36 boys.

We could also solve this problem in the following manner:

3 b

------ = ------- , where b represents the number of boys.

5 60

Then 5b = 180. Dividing both sides by 5, we get b = 180/5 = 36 boys

3 0

3 years ago

Given f(x)=x-10 . what is f(-7)?

Tomtit [17]

F(-7) = -7 - 10

f(-7) = -17

Hope I helped!

Let me know if you need anything else!

<span>~ Zoe (Rank:'Genius')</span>

8 0

3 years ago

Suppose a simple random sample of size n = 1000 is obtained from a population whose size is N = 2,000,000 and whose population p

faltersainse [42]

Answer:

$p(x\geq 520) = 0.0293$

Step-by-step explanation:

Given data:

random sample size n = 1000

Population size is N - 2,000,000

P = 0.49

We know

$\sigma_p = \sqrt{\frac{p*(1-p)}{n}}$

$\sigma_ p = \sqrt{\frac{0.49*(1-0.49)}{1000}} = 0.0158$

Probability for having X =520

sample proportion $\hat p = \frac{520}{1000} = 0.52$

$p(x\geq 520) = P(\hat p\geq)$

$= P(Z\geq \frac{0.52 - 0.49}{0.0158})$

$= P(Z\geq 1.89) = 0.0293$

$p(x\geq 520) = 0.0293$

6 0

3 years ago

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