Someone help me please

Answer:

Infinitely many solutions.

Step-by-step explanation:

Multiply the second equation by -2, then add the equations together

(20x+2y=18)

−2(10x+y=9)  

20x+2y=18

−20x−2y=−18

Add these equations to eliminate x

0=0

Infinitely many solutions.

Answer:

We want to rewrite:

sin^4(x)

in a way that only involves the first power of the cosine function.

We know that:

sin^2(x) = 1 - cos^2(x)

Then:

sin^4(x) = sin^2(x)*sin^2(x) = sin^2(x)*(1 - cos^2(x))

Now we know that:

cos(2x) = cos^2(x) - sin^2(x)

then

cos(2x) + sin^2(x) = cos^2(x)

We can replace that in our equation to get:

sin^2(x)*(1 - cos^2(x)) =  sin^2(x)*(1 - cos(2x) - sin^2(x) )

sin^2(x)*(1 - cos(2x) - sin^2(x) ) = sin^2(x) - sin^2(x)*cos(2x) - sin^4(x)

then:

sin^4(x) =  sin^2(x) - sin^2(x)*cos(2x) - sin^4(x)

sin^4(x) + sin^4(x) =   sin^2(x) - sin^2(x)*cos(2x)

2*sin^4(x) =  sin^2(x) - sin^2(x)*cos(2x)  = sin^2(x)*(1 - cos(2x))

sin^4(x) = sin^2(x)*(1 - cos(2x))/2

So we rewrite the equation in such a way that we only have the first power of the cosine function.

Answer:

The answer is number 3

Step-by-step explanation:

I hada this question on a quiz and i clicked this and it was rigt

Answer:

The answer is "[tex]142,857 \times 6=857,142[/tex]"

Step-by-step explanation:

Please find the complete question in the attached file.

Let:

[tex]a b c d e f \times 6 = d e f a b c[/tex]

[tex]\to (10^5 a+10^4 b+10^3c+10^2d+10e+f) \times 6 =10^5d+10^4e+10^3f+10^2a+10b+c \\\\\to ( 6 \times 10^5 a+ 6 \times 10^4 b+6 \times 10^3c+ 6 \times 10^2d+ 6 \times 10e+ 6 \times f) =10^5d+10^4e+10^3f+10^2a+10b+c \\\\\to 600,000a+60,000b+6,000c+600d+60e+6f=100,000d+10,000e+1,000f+100a+10b+c \\\\\to 599,900a+59,990b+5999c=99,400d+9,940e+994f\\\\[/tex]

[tex]\to 7(599,900a+59,990b+5999c)=7(99,400d+9,940e+994f)\\\\\to 85,700a+8,570b+857c=14,200d+1420e+142f\\\\\to 857(100a+10b+c)=142(100d+10e+f)\\\\\to \frac{(100a+10b+c)}{(100d+10e+f)}=\frac{142}{857}\\\\\to \frac{abc}{142}=\frac{de f}{857}\\[/tex]

therefore 142 and 857 are mutually exclusive, so, the only possible way is:

[tex]\to a=1; b=4; c=2; d=8; e=5; f=7 \\\\ \therefore \\\\ \to 142,857 \times 6=857,142[/tex]

Answer:

y=6x+31

Step-by-step explanation:

Answer:

[tex]y-1=6(x+5)[/tex]

Step-by-step explanation:

The given point is (-5, 1) and the slope is 6.

Point-slope form is given by:

[tex]y-y_1=m(x-x_1)[/tex]

We will let (-5, 1) be (x₁, y₁) and we will substitute 6 for m. Therefore:

[tex]y-(1)=6(x-(-5))[/tex]

Simplify:

[tex]y-1=6(x+5)[/tex]

Answer:

1.6f + 0.4j - 13

Step-by-step explanation:

Answer:

1.6f+0.4j-13

Step-by-step explanation:

-1.3f + 0.4j - 12 - 1 + 2.9f

Combine like terms

-1.3f+2.9f     +0.4j    -12-1

1.6f+0.4j-13

Answer: 14.1

Step-by-step explanation:

Answer:

58.50

Step-by-step explanation:

Hope it helps and I hope you have a wonderful rest of your day!!!! :)

Answer:

Step-by-step explanation:y=4  x=3

Answer:

Step-by-step explanation:

1035-15% of 1035= cost price

=1035-15/100x1035

=1035-155.25

=879.75

Answer:

4×3+3=15

so the answer must be 15

Answer:

-35

Step-by-step explanation:

X's cancel out each other

-10+-25

Answer:

[tex]\vec v = 2\cdot \vec a = \langle -4,6 \rangle[/tex]

Step-by-step explanation:

Let [tex]\vec a = \langle -2, 3 \rangle[/tex], we need to determine [tex]\vec v = 2\cdot \vec a[/tex], which can be found by applying the following property:

[tex]\alpha \cdot \langle x,y \rangle = \langle \alpha \cdot x, \alpha \cdot y\rangle[/tex], [tex]\forall \,\alpha,x,y\in \mathbb{R}[/tex] (1)

Then,

[tex]\vec v = 2\cdot \langle -2,3 \rangle[/tex]

[tex]\vec v = \langle -4,6 \rangle[/tex]

Answer:

700

Step-by-step explanation:

35 m = 3500 cm

3500 cm ÷ 5 cm = 700

Answer:

-1/36

Step-by-step explanation:

18=-1/(2k)

2k=-1/18

k=(-1/18)/2

k=(-1/18)(1/2)

k=-1/36

Answer:

x = 25

Step-by-step explanation:

Since ∠ A = ∠ B then the triangle is isosceles and AC = BC , that is

4x - 30 = 2x + 20 ( subtract 2x from both sides )

2x - 30 = 20 ( add 30 to both sides )

2x = 50 ( divide both sides by 2 )

x = 25

Step-by-step explanation:

x=11

hope it helps.

comment me if im correct then i will post step by step

and sorry, if im incorrect.

Answer:

The GCF of 40x and 25 is 5.

Step-by-step explanation:

5 goes into both 40 and 25.

Answer:

(-2, -1, 0, 3,3)

Step-by-step explanation:

The domain simply refers to the possible x-values the function can take

so by listing out all the x-values of the individual points, we have all the domains

That will be ;

(-2, -1, 0, 3,3)

Answer:

$36.38

Step-by-step explanation:

If the sales tax rate is 7% in New York, then how much sales tax would you pay in New York for a $34 pair of pants?

Given data

Tax= 7%

Cost = $34

Let us solve for the amount of tax

=7/100*34

=0.07*34

=2.38

Hence the total is =2.38+34

=$36.38

Answer:

1.918

Step-by-step explanation:

1 then do 459/500 x 2 to make 918/1000 then add and convert

Step-by-step explanation:

[tex]{ \huge {\underline {\underline {\mathtt {\red{♡Answer}}}}}}[/tex]

=> X - 2 = -8

=> X=(-6) - 2

=> -8

Answer:

x = -6

Step-by-step explanation:

x - 2 = -8

Add 2 to both sides to isolate the variable, x.

x - 2 + 2 = -8 + 2

-2+2 = 0

-8+2 = -6

Therefore,

x = -6

Check:

-6 -2 = -8

Hope this helps

Answer:

what is it

Step-by-step explanation:

Answer:

4/5

Step-by-step explanation:

Multiply 4/1 and 5/1

Answer:

4/5

Step-by-step explanation:

Answer:

Yes

Step-by-step explanation:

15% of 17500 is 2625 which you would subtract of off the original price. So it would be 14875, which is less than 15000.

Answer:

8x^2+122x-481

Step-by-step explanation:

you need to multiply these together to simplify.

(4x-13)(2x+37)

8x^2+148x-26x-481

8x^2+122x-481

not sure if this is what you were asking or if it needed to be graphed or what but i hope this helps?

Answer:

See the distances bellow

Step-by-step explanation:

Given data

D(-5, -6), E(5, 2)

substitute into the expression for the distance

[tex]d= \sqrt((x_2 - x_1)^2 + (y_2 - y_1)^2)\\\\d= \sqrt((5+5)^2 + (2+6)^2)\\\\d= \sqrt((10)^2 + (8)^2)\\\\d= \sqrt(100 +64)\\\\d= \sqrt((164)\\\\d= 12.80[/tex]

E(5, 2), F(4, -4)

[tex]d= \sqrt((x_2 - x_1)^2 + (y_2 - y_1)^2)\\\\d= \sqrt((4-5)^2 + (-4-2)^2)\\\\d= \sqrt((-1)^2 + (-6)^2)\\\\d= \sqrt(1+36)\\\\d= \sqrt((37)\\\\d= 6.08[/tex]

F(4, -4), G(-6, -12)

[tex]d= \sqrt((x_2 - x_1)^2 + (y_2 - y_1)^2)\\\\d= \sqrt((-6-4)^2 + (-12+4)^2)\\\\d= \sqrt((-10)^2 + (-8)^2)\\\\d= \sqrt(100+64)\\\\d= \sqrt((164)\\\\d= 12.80[/tex]

G(-6, -12),  D(-5, -6)

[tex]d= \sqrt((x_2 - x_1)^2 + (y_2 - y_1)^2)\\\\d= \sqrt((-6+5)^2 + (-12+6)^2)\\\\d= \sqrt((-1)^2 + (-6)^2)\\\\d= \sqrt(1+36)\\\\d= \sqrt((37)\\\\d= 6.08[/tex]

Answer:

GCF: 2x

Factored: 2x(x+3)(x-3)

Step-by-step explanation:

Answer:

A. 17 m

Step-by-step explanation:

perpendicular (p) = 15 m

base (b) = 8 m

hypotenuse (h) = ?

We know that by using Pythagoras theorem

h = √p² + b²

= √ 15² + 8²

= √289

= 17 m

Hope it will help :)

Answer:

question 2 is a

question 4 is a

I don't know number 3 sorry!

Step-by-step explanation:

Law of detachment. If a conditional is true and its hypothesis is true, then its conclusion is true. In symbolic form, if p → q is a true statement and p is true, then q is true.

not detachment

Law of Syllogism says that if the following two statements are true: (1) If p , then q . (2) If q , then r . Then we can derive a third true statement: (3) If p , then r .

so not Syllogism

law of contraposition says that a conditional statement is true if, and only if, its contrapositive is true

not contraposition either

hope this helps! <3