10. In how many ways can a student select 7 out of 10 questions to work on an exam

Answer:

18

Step-by-step explanation:

Answer:

6

Step-by-step explanation: 1/3 12 is 4 and 2/3 would be 6 and if you divide that by 3 you get two two plus two is four so not simlyfyed it would be 4/6

may i have brainlyest  please have a great day

Answer:

g(x) = 3 (x + (-5)) (x + (-9))

Zeros: (5 and 9)

Step-by-step explanation:

3a² -42a +135 = 3 (a² - 14a +45) = 3 (a-5) (a-9)

3 (a-5) (a-9) = 0

a = 5 or a = 9 ..... Zeros

Answer:

Option c.

Step-by-step explanation:

Using the normal curve to approximate a sampling distribution:

For a sample size n and a proportion n, the normal curve can be used if:

[tex]np \geq 10[/tex] and [tex]n(1-p) \geq 10[/tex]

Option a:

[tex]np = 35*0.8 = 28 > 10[/tex]

[tex]n(1-p) = 35*0.2 = 7 < 10[/tex]

So option a cannot be used.

Option b:

[tex]np = 65*0.9 = 58.5 > 10[/tex]

[tex]n(1-p) = 65*0.1 = 6.5 < 10[/tex]

So option b cannot be used.

Option c:

[tex]np = 65*0.8 = 52 > 10[/tex]

[tex]n(1-p) = 65*0.2 = 13 > 10[/tex]

So option c can be used, and is the answer

Option d:

[tex]np = 35*0.9 = 31.5 > 10[/tex]

[tex]n(1-p) = 35*0.1 = 3.5 < 10[/tex]

So option d cannot be used.

The answer is given by option c.

Answer:

1/4

Step-by-step explanation:

i know because it's 1/4 of the square

see it's cut in half, then one half is cut in half again

(1/2)*(1/2) = 1/4

Brainliest me

Answer:

Step-by-step explanation:

sinx=(opposite side)/(hypotenuse)

There really is no ‘explanation’ as that ratio IS the definition of sin.

Step-by-step explanation:

4x=3×8

4x=24

x=24÷4

x=6

Answer:

I think the one on the left is 285.26

Answer:

The simple interest that said investment yielded was 3.75% per year.

Step-by-step explanation:

Given that Sarah's current account balance is $ 2,600, and she made a single lump sum amount of $ 2,000 eight years ago into the account, to calculate the equivalent simple interest rate (quoted annually) that she earned the following calculation must be performed:

(2,600 - 2,000) / 8 = X

600/8 = X

75 = X

2,000 = 100

75 = X

75 x 100 / 2,000 = X

7,500 / 2,000 = X

3.75 = X

Thus, the simple interest that said investment yielded was 3.75% per year.

Answer:

1. 10.625

2. 11

3. 11

Step-by-step explanation:

Answer:

80 markers

Step-by-step explanation:

Set it up as an equation.

markers/erasers 5/2=x/32

Cross multiply to get 160=2x

x=80

Answer:

C) 273 ft²

Step-by-step explanation:

7x11x3=231

2x1/2x7x6=42

231+42=273

Answer:

x = 5+6y

Step-by-step explanation:

Let x represents the age of the father and  y represents the present age of the son.

ATQ,

The present age of  the father is 5 more than 6 times the  age of the son. We can write it in the form of equation as follows :

6 times the  age of the son means 6y. So,

x = 5+6y

Hence, the mathematical equation is "x = 5+6y".

Answer:

0

Step-by-step explanation:

f(x) = y

To find f(2), it means to find the value of y when x = 2.

From the graph, when x = 2, the corresponding y-coordinate = 0.

Therefore,

f(2) = 0

Answer:

6

Step-by-step explanation:

2^1 is 2, so 2x3 is 6

Answer:

2 to the first power is just 2 so it’s 2 times 3 = [tex]\boxed{6}[/tex]

Given:

A figure of a right triangle.

To find:

The value of x and value of y.

Solution:

In a right angle triangle,

[tex]\sin \theta = \dfrac{Opposite}{Hypotenuse}[/tex]

[tex]\cos \theta = \dfrac{Base}{Hypotenuse}[/tex]

In the given triangle,

[tex]\sin (60^\circ)=\dfrac{x}{6}[/tex]

[tex]\dfrac{\sqrt{3}}{2}=\dfrac{x}{6}[/tex]

[tex]\dfrac{\sqrt{3}}{2}\times 6=x[/tex]

[tex]3\sqrt{3}=x[/tex]

And,

[tex]\cos (60^\circ)=\dfrac{y}{6}[/tex]

[tex]\dfrac{1}{2}=\dfrac{y}{6}[/tex]

[tex]\dfrac{1}{2}\times 6=y[/tex]

[tex]3=y[/tex]

Therefore, the value of x is [tex]3\sqrt{3}[/tex] and the value of y is 3.

Answer:

X coordinate times 11 :)

Step-by-step explanation:

27.76% I believe. infinite decimal.

Answer: 27.75 decrease

Step-by-step explanation:

45 times .85 (100-15(perecent)= 85) is a
a times .85 is b
(b-45)/45 is -0.2775 which is 27.75% which is -27.75

Answer:

3/7 times 5/4

Step-by-step explanation:

when dividing fractions, all you do is keep the first fraction, change the sign to multiplication, and flip the last fraction. In this case it would be 3/7 and 5/4

Answer:

The answer is B: 3/7 times 5/4.

Step-by-step explanation:

The process is stay, change, flip.

Stay equals keep the first fraction the same (3/7).

Change equals change the operation (division to multiplication).

Flip equals flip the second fraction (flip 4/5 to 5/4).

3/2

Step-by-step explanation:

Since

3

2

is already positive,

3

2

is the absolute value of

3

2

. If you were asked for the absolute value of

−

3

2

, it would be

3

2

too since the modulus function would turn

−

3

2

to positive.

∣

∣

∣

3

2

∣

∣

∣

=

3

2

∣

∣

∣

−

3

2

∣

∣

∣

=

3

2

Answer:

3/2

Step-by-step explanation:

|3/2| = 3/2

Absolute value is the distance away from zero. These parentheses things (super long lines) | | indicate absolute value. For example, |-3| is 3 and |3| is also 3.

I hope this explains somethings.

Answer:

False

The answer is 343 not 345

Step-by-step explanation:

7^5 / 7^2 =

16807 / 49 =343

Answer:

False.

7⁵ ÷ 7²

= 7⁽⁵⁻²⁾

= 7³

= 343

Answer:

Step-by-step explanation:

[tex]d^2=(x2-x1)^2+(y2-y1)^2\\ \\ d^2=(-3-5)^2+(4-4)^2\\ \\ d^2=64\\ \\ d=8[/tex]

Answer:

23.9425 (Round if needed)

Step-by-step explanation:

This is 2 half circles so you can find the area of a circle and divide it by 2.

First circle has a diameter of 6 cm

6/2=3 cm

So, circle has radius of 3.

Area of circle= 3.14(pi) radius^2

3.14 x 3^2= 28.26

28.26/2=14.13 cm

Area of first half circle= 14.13

Repeat that process for the second circle.

3.14 x 2.5^2=19.625

19.625/2=9.8125

14.13+9.8215=23.9425

Area=23.9425

Answer:

3

Step-by-step explanation:

f(1)=−3

f(n)=2⋅f(n−1)+1

​ f(2)= 2×1(2-1)+1

       = 2×1+1

       = 2+1

        = 3

Answer:

-5

Step-by-step explanation:

Answer:

Heyyyyy

Step-by-step explanation:

Answer:

yess

Step-by-step explanation:

Answer:

the last one(26 by 22) not sure whether its D or E but yah

Step-by-step explanation:

Answer:

It is D and E

Step-by-step explanation: