The proportions of blood types O, A, B, and AB in the general population of a particular country are known to be in the ratio 49:38:9:4, respectively. A research team, investigating a small isolated community in the country, obtained the following frequencies (i.e. observed number of cases) of blood type.
Blood type O A B AB
Frequency 87 59 20 4
Test the hypothesis that the proportions in this community do not differ significantly from those in the general population.

Standard form:

x - y = 7

Factored form:

y = x - 7

Answer:

y = x - 3 - 4

y = x - 7

(x - 7 = y)

(x = y + 7)

Step-by-step explanation:

Hope you got it.

Answer:

108

Step-by-step explanation:

Answer:

I don't get it is there more option or something.

Answer:

a. (4+3)² ÷ (10-3)

Step-by-step explanation:

Because 4+3 is 7 then to the second power is 49 divide that by 7 which gives you 7.

Answer:

the solution set is -11 > 1 + a?

a > -10

a -12

a < -10

Answer:

The Olympic sized swimming pool hold 660501.9 gallons of water.

Step-by-step explanation:

Given that:

Water hold by an Olympic sized swimming pool = 2500000 liters

We know that;

1 gallon = 3.785 liters

Therefore,

We will divide the total number of water in liters by 3.785 to find the number of gallons.

Gallons of water in pool = [tex]\frac{2500000}{3.785}[/tex]

Gallons of water in pool = [tex]660501.9[/tex] gallons

Hence,

The Olympic sized swimming pool hold 660501.9 gallons of water.

Answer:

Not a triangle.

Step-by-step explanation:

Sum of the two smaller sides must be greater than the largest side.

Answer:

the  amount paid by the customer for the product is $192.40

Step-by-step explanation:

The computation of the amount paid by the customer for the product is shown below:

= Total amount + Total amount × tax rate

= ($299 + $10 - $99 - $25) + ($299 + $10 - $99 - $25) × 0.04

= $185 + 185 × 0.04

= $185 + $7.4

= $192.40

Hence, the  amount paid by the customer for the product is $192.40

We simply applied the above formula so that the correct value could come

And, the same is to be considered

Answer:

42

Step-by-step explanation:

Since 7x5=35, then 7x6=42. This is known as the fives fact rule, and I used it to figure it out.

Hope this helps! :)

Following are the facts to solve the given expression:

Given:

[tex]\to 7 \times 6[/tex]

To find:

facts=?

Solution:

[tex]\to 7 \times 6=42[/tex]

Fact 1:

[tex]\to 42= 6 \times 7[/tex]

Fact 2:

[tex]\to 42= 3 \times 2 \times 7[/tex]

Fact 3:

[tex]\to 42 =(4 \times 10)+ (2\times 1)[/tex]

Fact 4:

[tex]\to 42= (5\times 8) + (2\times 1 )[/tex]

Fact 5:

[tex]\to 42=(3 \times 12)+(2 \times 3)[/tex]

Learn more about facts for solving equations:

brainly.com/question/8648763

Answer:

D. 7

Step-by-step explanation:

substitute -1 everywhere there is an x

5-2(-1)  multiply

5-(-2) add

7

Answer:

383 m

Step-by-step explanation:

Answer:

Z fine black powder

Answer:

x° = 36°, y° = 36°, z° = 72°

Step-by-step explanation:

Each interior angle of a regular polygon is given by the following formula;

Interior angle = (n - 2)×180°/n

Where;

n = The number of sides on the polygon

For the pentagon, we have;

n = 5, therefore;

Interior angle = (5 - 2)×180°/5 = 108°

ΔDCA is an isosceles triangle, with the segments CD and CA being equal, therefore;

∠ADC = ∠DAC = x°, and ∠ACD = 108°

Therefore

x° = (180° - 108°)/2 = 36°

x° = 36°

∠BAC = 2·x° + y° = 108°

∴ y° = 108° - 2·x° = 108° - 2 × 36° = 36°

y° = 36°

ΔADE is an isosceles triangle, with segments AD and AE equal, therefore, the base angles are z° each

Therefore, in ΔADE, we have;

z° = (180° - 36°)/2 = 72°

z° = 72°

Answer:

On a coordinate plane, a horizontal line is at y = 3 and another line goes through (0, 4) and (4, 0).

Step-by-step explanation:

Answer:

-5/2-39/2

Step-by-step explanation:

Answer:

w≥31.25

Step-by-step explanation:

175+8w≥425

-175        -175

8w≥250

/8       /8

w≥31.25

Answer:

X is greater than or equal to 125/4

Step-by-step explanation:

Subtract 175 from both sides which will turn 425 into 250

Divide 8 from 8x to the other side to turn 250 into 125/4

In the end, you get X is greater or equal to 125/4

4/14 is equivalent. This was found by multiplying both the numerator and denominator by 2.

Answer:

x=21

Step-by-step explanation:

45+x+the last angle=180

x+159=180

180-159=21

21+45= 66

180-66=114

so i think x would be 21 degrees but im not entirely sure do not quote me on this sorry

Answer:

125 mL

Step-by-step explanation:

We are given:

V₁ = x mL

C₁ = 80%

V₂ = 200 mL

C₂ = 50%

Solving for x:

We know that:

V₁C₁ = V₂C₂                                [Concentration formula]

replacing the values:

x(80) = (200)(50)

x = 125 mL                                [Dividing both sides by 80]

Answer:

the answer is b

Step-by-step explanation:

Answer:

uh is it 6.5???

Step-by-step explanation:

Answer:

H = 46

Step-by-step explanation:

Add 18 to both sides to get h by itself

h = 46

Final Answer: [tex]h = 46[/tex]

Steps/Reasons/Explanation:

Question: Solve for [tex]h[/tex]. [tex]-18 + h = 28[/tex]. [tex]h[/tex] = ?

Step 1: Regroup the terms.

[tex]h - 18 = 28[/tex]

Step 2: Add [tex]18[/tex] to both sides.

[tex]h = 28 + 18[/tex]

Step 3: Simplify [tex]28 + 18[/tex] to [tex]46[/tex].

[tex]h = 46[/tex]

~I hope I helped you :)~

Answer:

those are called quarters

Answer:

Well Caden has 3 quarters (which . 75 cents since they are .25 cents a piece ), he also has a dime, (which is .10 cents ) and also a nickel. ( which is .5 cents)

Caden: .75+.10+.5= $1.00

Eden has a quarter (.25 cents), 2 dimes (.20 cents) and 2 nickels ( .10 cents )

Eden : .25+.20+.10= .55 cents

Harper has 2 quarters (.50 cents), 2 dimes ( .20 cents) and 2 nickels( .10 cents)

Haper: .50+.20+.10= .80cent s

Step-by-step explanation:

I hope this helps and if it does please mark me the brainliest! Peace and love

Answer:

d number is the correct answer of the question

Answer:

d. Independent Variable: time, Dependent Variable: annual income

Income rises steadily then drops off sharply before beginning to rise again

Step-by-step explanation:

Answer:

3 ft.

Step-by-step explanation:

15:20 and x:4 you can cross multiply or if you reduce 15:20, the answer is 3:4

Answer:

it is c

Step-by-step explanation:

the lines are parallel to each other

Answer:

you welcome bih

Step-by-step explanation:

Answer:

Congrats

Step-by-step explanation:

I'm glad its helping.

Answer:

(2x+-4=6-

We move all terms to the left:

(2x+-4-(6-)=0

We add all the numbers together, and all the variables

(2x+-4-0=0

We use the square of the difference formula

(2x-4-0=0

Step-by-step explanation:

Answer:

AC = 49

Step-by-step explanation:

Using the Altitude - on - Hypotenuse theorem

(leg of large Δ )² = (part of hypotenuse below it ) × (whole hypotenuse)

BC² = DC × AC, substitute values

14² = 4 × x

196 = 4x ( divide both sides by 4 )

49 = x

Thus AC = x = 49

Step-by-step explanation:

pythogoream theorem.(hyp^2=opp^2+adj^2)

hyp=14 adg=4 opp=?

since we have to find opp

opp^2=hyp^2-adj^2

opp^2=14^2-4^2

196-16=180

[tex] \sqrt{180} [/tex]

BD= 13.41

(Q as theta)

sinQ= opp÷hyp

= 13.41÷14

Q=sin^-1(13.4÷14)

Q=73.33

cosQ=adj(AD)÷hyp(BC)

cos 73.33× 14 =adj

AD=4.01

Therefore, AC =AD +DC(4.01+4)

=8.01

I am not sure....but I got this much