PLEASE I NEED HELP ON THIS

D. Multiply the top equation by 2.

Answer:

D

Step-by-step explanation:

Given the 2 equations

8x + 3y = 2 → (1)

4x - 6y = - 7 → (2)

Multiplying the top equation (1) by 2 and adding to (2) will eliminate y

16x + 6y = 4 → (3)

Add (2) and (3) term by term to eliminate y

20x + 0 = - 3

20x = - 3 ( y has been eliminated )

Answer:

Please check explanations

Step-by-step explanation:

Using the difference of two squares, the lowest common multiple becomes;

1-sin^2 a

Thus, we have that;

cos a (1-sin a) + cos a (1 + sin a) /1 - sin^2 a

1 - sin^2 a = cos^2 a

That means;

{cos a - cos a sin a + cos a + cos a sin a}/ cos^2 a

= 2cos a / cos^2 a

= 2/cos a

but 1/cos a = sec a

Thus;

2/ cos a = 2 sec a

Answer:

The tree's shadow is 20 ft long.

Step-by-step explanation:

If you take 6 and 15 and turn it into a fraction 6/15 and take 8 and the missing value (x) and turn that into a fraction 8/x, then you can move to the multiplication.

6/15 *8/x = 6x=120/6

120/6=20

Hope this helps :)

Answer:

Solution in photo

Step-by-step explanation:

Answer:

2x + 49 = -8 (-x-5)

x=-57/2

x=-28.5

because if you substitute x for 28.5, it makes it equal

Step-by-step explanation:

Hope I Helped!!!

Answer:

Angle a=45, Angle b=45

Step-by-step explanation:

The angles are complementary angles which means they both add up to 90 degrees.  And if angles a and b are equal then its 90/2 which is 45.

Answer:

It is the 3rd answer, 1/5³. I checked. Happy to help. Brainliest would be thanking.

Answer:

Justin drove 90 miles in 3 hours.

Step-by-step explanation:

Given that:

Justin drives 7.5 miles in 15 minutes.

Speed of Justin = [tex]\frac{7.5}{15}[/tex]

Speed of Justin = 0.5 miles per minute

For speed in hours, we will multiply by 60

Speed of Justin = 0.5 * 60 = 30 miles per hour

Distance covered in 3 hours = 30 * 3 = 90 miles

Hence,

Justin drove 90 miles in 3 hours.

The total distance covered by Justin at the same rate is equal to 90 miles.

Given the following data:

Conversion:

1 hour = 60 minutes

3 hours = 180 minutes

To determine the total distance covered by Justin at the same rate:

First of all, we would calculate the rate of Justin's speed as follows:

[tex]Speed =\frac{distance}{time} \\\\Speed =\frac{7.5}{15}[/tex]

Speed = 0.5 miles per min.

For the total distance:

[tex]Total\;distance = speed \times total\;time\\\\Total\;distance = 0.5 \times 180[/tex]

Total distance = 90 miles.

Read more: https://brainly.com/question/10545161

Answer:

x = -9

Step-by-step explanation:

x • -10 = 90

x = 90/-10

x = -9

Hope this helped! <3

Answer:

100(0.5)^X/7

Step-by-step explanation:

That is how you would put it ;)

Answer:

Step-by-step explanation:

$288= 6/5x,  x being the number we are looking for

We can then divide 288 by 6/5, which is the same as (288x5)/6

This will give you 240=x, which is $240

Answer: 8 1/20 or 8.05.

Step-by-step explanation: First you would want to make 9 3/4 - 2 1/5 to 39/4 - 11/5. We need to get the LCD or Least Common denominator of 4 and 5, which is 20. The rule is what you multiplied the denominator by you must multiply the numerator by, so our new equation is 195/20 - 44/20, which is 151/20. Now, we have to find the LCD of 2 and 20, which is 10. So 151/20 + 10/20 is 161/20 or 8 1/20.

Answer:

median is 3.9

Step-by-step explanation:

You arrange them all from the smallest to the biggest, then cross out pairs from each side till you get the one in the middle

0.8, 2.6, 2.8, 3.5, 3.9, 4.6, 6.8, 8.5, 8.6

Answer:

912 divided byt he square root of AB to 5^2

Step-by-step explanation:

Answer:

AB to 5^2

Step-by-step explanation:

Flattykawa -_-

Answer:

[tex]x = 2[/tex]

Step-by-step explanation:

Given

Conjecture: [tex]x + 3 < x^2[/tex] --- (Missing)

Required

Which value of x prove the conjecture otherwise

To do this , we simply substitute the values of x in the options

[tex]1.\ x = -\frac{1}{3}[/tex]

This is negative;

So, there is no need to check

[tex]2.\ x = -3[/tex]

This is also negative;

So, there is no need to check

[tex]3.\ x = 2[/tex]

[tex]x + 3 < x^2[/tex]

[tex]2 + 3 < 2^2[/tex]

[tex]5 < 4[/tex]

This value of x is false because 5 is not less than 4

[tex]4.\ x = 3[/tex]

[tex]x + 3 < x^2[/tex]

[tex]3 + 3 < 3^2[/tex]

[tex]6 < 9[/tex]

D

Step-by-step explanation:

I just took the test and I got it write

Answer:

The answer is x units.

Step-by-step explanation:

We are tasked to solve for the expression that represents the height of the prism. We are given with the following values:

length = x² units

volume = x³ units

We will use the formula below:

V = length x height

x³ = x² * height

height = x³/x units

height = x units

The answer is x units.

               Step-by-step explanation:

Answer:

The answer is B.

Step-by-step explanation:

Learn it yourself kid.

Answer and Step-by-step explanation:

First, look at the inequality. We see the there is a greater than or equal to sign.

That means the graphs can NOT be C or D, since those graphs only apply to inequalities with the greater than or less than sign.

That leaves us with graphs A and B.

We see the y is greater than the value, so anything above the line is filled in.

That means that graph A is the answer. Which means,

Answer choice B, graph A.

#teamtrees #WAP (Water And Plant)

Answer:

X-4

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable

Answer:

16

Step-by-step explanation:

Answer:

-5a+3b

Step-by-step explanation:

-5a+3b Combine like terms

Answer: [tex]6\ ft^3[/tex]

Step-by-step explanation:

Given

[tex]14\ ft^3[/tex] cement is used

The volume of each square cement slab is [tex]4\ ft^3[/tex]

So, Volume of two square slab=[tex]2\times 4=8\ ft^3[/tex]

The volume of middle slab= Total Volume -Volume of square slabs

                                           =[tex]14-8=6\ ft^3[/tex]

Answer:

6

Step-by-step explanation:

Answer:

[tex]A^{'}[/tex] = {1,3,5,7,9,....}

[tex]B^{'}[/tex] = {1,2,4,5,7,8,10,11,13,14......}

[tex]C^{'}[/tex] = {1,2,3,4,5}

[tex]D^{'}[/tex] = {10,11,12,13,14,15,......}

Step-by-step explanation:

Solution:

It is given that, Universal set is the set of all Natural Numbers.

and

Set A, Set B, Set  C, Set D are subsets of Universal set.

A = {x:x is even natural numbers} = {2,4,6,8,10,.....}

B = {x:x ∈ N and x is a multiple of 3} = {3,6,9,12,15,....}

C = {x:x∈ N and x < 5} = {6,7,8,9,10,.....}

D = {x:x ∈ N and x > 10} = {1,2,3,4,5,6,7,8,9}

U = {1,2,3,4,5,6,7,8,9,10,11,........}

Complements:

[tex]A^{'}[/tex] = U-A = {1,2,3,4,5,6,7,8,9,10,11,........} - {2,4,6,8,10,.....}

[tex]A^{'}[/tex] = {1,3,5,7,9,....}

[tex]B^{'}[/tex] = U-B =  {1,2,3,4,5,6,7,8,9,10,11,........} - {3,6,9,12,15,....}

[tex]B^{'}[/tex] = {1,2,4,5,7,8,10,11,13,14......}

[tex]C^{'}[/tex] = U-C = {1,2,3,4,5,6,7,8,9,10,11,........} - {6,7,8,9,10,.....}

[tex]C^{'}[/tex] = {1,2,3,4,5}

[tex]D^{'}[/tex] = {1,2,3,4,5,6,7,8,9,10,11,........} - {1,2,3,4,5,6,7,8,9}

[tex]D^{'}[/tex] = {10,11,12,13,14,15,......}

Answer:

The sale price would be $80.00

Step-by-step explanation:

1/3 (33%) of $120 is $40.

$120 - $40 = $80