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kompoz [17]
3 years ago
13

HELP ASAP! 20 POINTS! 5 QUESTIONS!

Mathematics
1 answer:
Ainat [17]3 years ago
6 0

Answer:

1. Let the unknown number be x

The phrase “8 and” means addition so that’s 8 +

5 times a number is multiplication so that’s 5 times x, or simply, 5x

So the correct equation would be 8 + 5x = 43

And the correct value for variable x is 7

8 + 35 = 43

2. A

3. Here we can see that there has to be a single unknown variable and using that variable we have to create an equation. That equation will ultimately help us to find the exact value of the variable. This way we can easily reach the answer that is asked in the question.

Let us assume the length of the first piece = x

Length of the second piece = 2x

Length of the third piece = 6x

Now we can get to the equation

x + 2x + 6x = 180

9x = 180

x = 180/9

 = 20

So the length of the first piece of the board is 20 feet.I hope i have explained the problem to your satisfaction and understanding

4. C

5. B

Step-by-step explanation:


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solve for each please i really need help if u want to help me with my test and i get an a or a b i will give u 500 dollars
Len [333]

Answer:

The relation is not a function

The domain is {1, 2, 3}

The range is {3, 4, 5}

Step-by-step explanation:

A relation of a set of ordered pairs x and y is a function if

  • Every x has only one value of y
  • x appears once in ordered pairs

<u><em>Examples:</em></u>

  • The relation {(1, 2), (-2, 3), (4, 5)} is a function because every x has only one value of y (x = 1 has y = 2, x = -2 has y = 3, x = 4 has y = 5)
  • The relation {(1, 2), (-2, 3), (1, 5)} is not a function because one x has two values of y (x = 1 has values of y = 2 and 5)
  • The domain is the set of values of x
  • The range is the set of values of y

Let us solve the question

∵ The relation = {(1, 3), (2, 3), (3, 4), (2, 5)}

∵ x = 1 has y = 3

∵ x = 2 has y = 3

∵ x = 3 has y = 4

∵ x = 2 has y = 5

→ One x appears twice in the ordered pairs

∵ x = 2 has y = 3 and 5

∴ The relation is not a function because one x has two values of y

∵ The domain is the set of values of x

∴ The domain = {1, 2, 3}

∵ The range is the set of values of y

∴ The range = {3, 4, 5}

3 0
3 years ago
Make b the subject of the formula <br><img src="https://tex.z-dn.net/?f=k%20%3D%20%20%5Cfrac%7Bbrt%7D%7Bv%20-%20b%7D%20" id="Tex
balu736 [363]

Answer:

b = \frac{kv}{k+rt}

Step-by-step explanation:

Given

k = \frac{brt}{v-b} ← multiply both sides by (v - b)

k(v - b) = brt ← distribute left side

kv - kb = brt ( subtract brt from both sides )

kv - kb - brt = 0 ( subtract kv from both sides )

- kb - brt = - kv ( multiply through by - 1 to clear the negatives )

kb + brt = kv ← factor out b from each term on the left

b(k + rt ) = kv ← divide both sides by (k + rt )

b = \frac{kv}{k+rt}

5 0
3 years ago
Given that k // I, identify the congruent angles in the
muminat
V 23 is the correct answer
4 0
2 years ago
If x = 4 units, y = 12 units, and h = 8 units, find the area of the parallelogram shown above using decomposition.
____ [38]

Answer:

if by decomposition you mean breaking it into parts then

break it into 2 triangles and 1 rectangle

left to right

triangle with base y and height h

h=10

y=3

area of triangle=1/2bh

area=1/2(10)(3)

area=5(3)

area=15

rectangle of length x and height h

area= length times width

x=8

h=10

area=8 times 10

aera=80

last triangle

should be same as other since same base (y) and same height (h)

15

add

15+80+15=120

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Ryan planted 1/6 of his garden with green peppers and 1/6 of his
joja [24]

Answer:1/6 plus 1/6 is 1/3

Step-by-step explanation:

7 0
2 years ago
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