4 years ago

Which expression represents the sum of 4x and 20?

Mathematics

1 answer:

Karolina [17]4 years ago

8 0

The sum is adding 2 or more numbers so the answer would be B since it's adding two numbers

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If ABC~DEF what is the length of BC?<br><br> If ABC~DEF what is the length of EF?

marysya [2.9K]

BC would equal the same as EF, they are similar. All you would have to do is figure out the pre image (BC) of EF.

3 0

3 years ago

Help me plz this is hard

cricket20 [7]

you first use distributive property for the multiplication

[(2*4x)-(2*11)]+9=19

8x-22+9=19

Then, you need to leave the variable alone moving all the other numbers with the opposite operation (addition to substraction, substraction to addition, multiplication to division, division to multiplication)

8x=19+22-9

8x=(19+22)-9

8x=41-9

8x=32

Then as 8 and x are multiplying you pass it dividing

x=32/8

x=4

3 0

3 years ago

The area for a trapezoid is given by the formula below, where a and b are the lengths of the two bases and h is the height of th

aivan3 [116]

Answer:

Step-by-step explanation:

Given

A = $\frac{h(a + b)}{2}$

Substitute the given values with h = a, then

16.5 = $\frac{a(a+8)}{2}$ ( multiply both sides by 2 )

33 = a(a + 8) ← distribute

33 = a² + 8a ( subtract 33 from both sides )

0 = a² + 8a - 33 ← in standard form

0 = (a + 11)(a - 3) ← in factored form

Equate each factor to zero and solve for a

a + 11 = 0 ⇒ a = - 11

a - 3 = 0 ⇒ a = 3

However, a > 0 thus a = 3

Hence the height is 3 feet

4 0

3 years ago

I need help fast. 8th grade multiple question. (I added photos)

n200080 [17]

Answer:

C is the answer

Step-by-step explanation:

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3 years ago

Karen is studying the relationship between the time spent exercising per day and the time spent outside per day and has collecte

wariber [46]

Answer:

56.38=

Step-by-step explanation:

7 0

4 years ago