Is this correct? help me?

Answers

Answer 1

Answer: -2 3/8×1/2
-19/8×1/2
(-19×1)/(8×2)
-19/16

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A triangle has two sides of lengths 7 and 9. What value could the length of the third side be?
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A bill of $424 was paid with $5 bills and $2 bills. A total of 128 bills were used. Howmany of them were fives?

Answers

Answer: 56

Step-by-step explanation:

Let the number of $5 be x

Let the number of $2 be y.

Based on the information given, we can form an equation as:

x + y = 128 ........ i

5x + 2y = 424 ....... ii

Multiply equation i by 2

Multiply equation ii by 1

2x + 2y = 256 ...... iii

5x + 2y = 424 ....... iv

Subtract iii from iv

3x = 168

x = 168/3

x = 56.

Therefore, there were 56 $5 bills.

Write an explicit formula for the sequence 10,9.5,9,8.5,8 then find a8

Answers

an=a1+d(n-1)
a1=first term
d=common differnce
n=which term

minusing 0.5 each time
first term is 10

an=10-0.5(n-1)
8th term
a8=10-0.5(8-1)
a8=10-0.5(7)
a8=10-3.5
a8=6.5

the 8th term or a8 is 6.5

$a_(n) = a_(1) + (n-1)d$
$a_8 = 10 + (8-1)(-0.5) a_8 = 10 + (7)(-0.5) a_8 = 10 + -3.5 a_8 = 6.5$

Find the domain of each rational expression. f(x)=5x-7/4

Answers

$f(x)=5x-(7)/(4)$

The function is defined for all real numbers x

D=R

$1)\ \ \ f(x)=5x- (7)/(4) \ \ \ \Rightarrow\ \ \ D_f=R\n\n2)\ \ \ f(x)= (5x-7)/(4) \ \ \ \Rightarrow\ \ \ D_f=R$

An athlete eats 75g of protein per day while training. How much protein will she eat during 23 days of training? Write your answer in kilograms.

Answers

K ⇒ Kilograms
H
D
B ⇒ grams
D
C
M
75 ×23= 1725
distance between Kilo. and grams is 3 jumps
so you jump the decimal 3 jumps to the left
Answer: 1.725 Kilograms of protein

You multiply 75 by 23 to get 1725 and since a kilogram has 1000 grams in it, the athlete eats 1.725 kg of protein.

Which of the following is equivalent to (cd)5?

c5d
cd5
c5d5
5cd

Answers

If you would like to find the equivalent expression to (c*d)^5, you can do this using the following steps:

(c*d)^5 = c^5*d^5 = c^5d^5

The correct result would be c^5d^5.

The correct result would be c^5d^5.

the third option C, just took the test.

What set of reflections would carry triangle ABC onto itself? triangle ABC on the coordinate plane with point A at 1, 2, point B at 2, 4, and point C at 3, 0.

Answers

Your answer is Y-axis, X-axis, Y-axis, X-axis.
The A y-axis , B y-axis and C would also be reflected over the Y-axis. When you think about the coordinates on a graph, and with that also being said there all positive.

Answer:

y-axis, x-axis , y-axis and x-axis

Step-by-step explanation:

Given : In triangle ABC

The coordinates are

A = (1,2) , B=(2,4) and C =(3,0)

Rule of reflection:

*Reflecting a point (x, y) across the y-axis will map it to (-x, y).

*Reflecting a point (x, y) across the x-axis will map it to (x, -y).

If you do a reflection on coordinate point A = (1,2) across y-axis we get $(-1 ,2)$

then, reflecting a point (-1 , 2) across x -axis we get, (-1, -2)

then, reflecting a point (-1 , -2) across y-axis we get, (1 , -2)

and

reflecting a point (1, -2) across x- axis we get the result same i.e, A =(1,2)

Similarly,

For B = (2,4) across y-axis $\rightarrow$ (-2, 4) across x- axis $\rightarrow$ (-2, -4) across y -axis $\rightarrow$ (2 , -4) across x axis $\rightarrow$ ( 2, 4) = B

for C = (3, 0) across y-axis $\rightarrow$ (-3, 0) across x- axis $\rightarrow$ (-3, 0) across y -axis $\rightarrow$ (3 , 0) across x axis $\rightarrow$ (3, 0) = C

Therefore, the set of reflection would carry triangle ABC onto itself is:

y-axis, x-axis , y-axis and x-axis