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kumpel [21]
3 years ago
14

Which expression is a difference of squares?

Mathematics
2 answers:
prohojiy [21]3 years ago
6 0
The answer is
9 {m}^{4}  - 49 {n}^{6}
In the choices; the coefficients 21, 32 and 10 are not perfect squares.
KATRIN_1 [288]3 years ago
4 0

Answer:

Option A is the correct answer.

Step-by-step explanation:

Which expression is a difference of squares?

9m^{4}-49n^{6}

Here both 9 and 49 are perfect squares.

9 is the perfect square of 3 and 49 is the perfect square of 7.

In rest options, one term is a perfect square and one is not. Like in 2nd option, 16 is square of 4 but 21 is of none. Similarly in option 4th, 100 is a square of 10 but 10 is of none.

So, option A is the correct answer.

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What is the slope of the line?<br><br> A. 3<br><br> B. -3<br><br> C. 1/3 <br><br> D. -1/3
Inessa05 [86]

Answer:

B. -3

Step-by-step explanation:

Starting from the y-intercept of [0, -2], you do <em>rise\</em><em>run</em><em> </em>by either moving three blocks <em>north</em><em> </em>over<em> </em>one block <em>west</em><em>,</em><em> </em>or three blocks <em>south</em><em> </em>over one block <em>east</em><em> </em>[<em>west</em> and <em>south</em> are negatives].

I am joyous to assist you anytime.

3 0
3 years ago
A map has a scale of 2cm=50 km.If two cities appear 10 cm meters apart, how many kilometers apart really are they?
ra1l [238]

Answer:

2 cm = 50 km

Find what the rate would be if 2 became 10 by dividing

10/2=5

multiply the 5 with the rate

5 x 50 = 250

250 km apart

hope this helps

Step-by-step explanation:

4 0
2 years ago
In parallelogram HIJK, the measure of angle H is 45 degrees. 1.Find the measure of J and explain how you know
s2008m [1.1K]

Answer:

45°

Step-by-step explanation:

A parallelogram is a polygon with 4 sides and 4 angles (that is a quadrilateral).

For a parallelogram ABCD, Opposite sides and opposite angles are equal (i.e. BC = AD and ∠A = ∠C).

Consecutive angles are supplementary that is ∠A + ∠B = 180°.

The diagonals of a parallelogram bisect each other also separating the parallelogram into two congruent triangles.

In parallelogram HIJK, ∠H and ∠J are opposite angles. hence:

∠H = ∠J (opposite angles of a parallelogram are equal)

∠J = 45°

8 0
3 years ago
Which statements are related to 6 – 2 – 2 – 2 = 0? Check all that apply.
zzz [600]

Answer:

B, 6/2 and A

Step-by-step explanation:

4 0
2 years ago
The difference of two numbers is 90 and their quotient is 10
bija089 [108]
To solve this, set up two equations using the information you're given. Let's call our two numbers a and b:
1) D<span>ifference of two numbers is 90
a - b (difference of two numbers) = 90

2) The quotient of these two numbers is 10
a/b (quotient of the two numbers) = 10


Now you can solve for the two numbers.
1) Solve the second equation for one of the variables. Let's solve for a:
a/b = 10
a = 10b

2) Plug a =10b into the first equation and solve for the value of b:
a - b = 90
10b - b = 90
9b = 90
b = 10

3) Using b = 10, plug it back into one of the equations to find the value of a. I'll plug it back into the first equation:
a - b = 90
a - 10 = 90
a = 100

-------

Answer: The numbers are 100 and 10</span>
3 0
3 years ago
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