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Brut [27]
3 years ago
7

I need help with this problem :)

Mathematics
2 answers:
sukhopar [10]3 years ago
4 0

Answer:

a. 1/9

b. a³/b

c. y^{4}

d. 5⋅10^{-3} = 0.005

Step-by-step explanation:

klasskru [66]3 years ago
3 0

Answer:

48 \times \frac{8}{2} 6

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Help look at my photo
STALIN [3.7K]

Answer:

  • A  x² +2x +4
  • D  x² +10x +26

Step-by-step explanation:

One way to determine if the equation has any real solutions is to look at its discriminant. For the equation ax²+bx+c = 0, the discriminant is ...

  d = b² -4ac

When the discriminant is negative, both solutions to the quadratic are complex. There are no real solutions in that case.

We can find the discriminant values to be ...

  A: d = 2² -4(1)(4) = -12 . . . . no real zeros

  B: d = 0² -4(3)(-5) = 60 . . . two real zeros

  C: d = 8² -4(-2)(0) = 64 . . . two real zeros

  D: d = 10² -4(1)(26) = -4 . . .no real zeros

Expressions A and D have no real zeros.

_____

<em>Comment on the question</em>

You are given an <em>expression</em>, not an <em>equation</em>. There is no equal sign. Hence, we cannot talk about <em>solutions</em>. We can only talk about <em>zeros</em>, values of x that make the expression have a value of zero.

5 0
3 years ago
Helpppppp pleaseeee number 8,9 and the last one
garik1379 [7]
8 is:
a)2x+3
b)7x^2
c)3x^2+2x+1
d)x^2+2x+7
e)x^2+2x+3
f)7x^2+2x+1
g)3x
h)x^2+3x
9 is:
a)5x
b)4x+9
c)4x+2
d)4x-2
3 0
3 years ago
Read 2 more answers
Suppose that the cost of renting a snowmobile is $37.50 for 5 hours. What would be the cost of renting 2 snowmobiles for 5 hours
Artyom0805 [142]
Since 1 snowmobile is $37.50 for 5 hours you can multiply by 2 and get a total of $75 for 5 hours
8 0
3 years ago
Marty made a $220 bank deposit using $10 bills and $5 bills. She gave the teller a total of 38 bills, how many $5 bills were in
Luda [366]

ANSWER: 32 five-dollar bills

======

EXPLANATION:

Let x be number of $5 bills

Let y be number of $10 bills

Since we have total of 38 bills, we must have the sum of x and y be 38

x + y = 38 (I)

Since the total amount deposited is $220, we must have the sum of 5x and 10y be 220 (x and y are just the "number of" their respective bills, so we multiply them by their value to get the total value):

5x + 10y = 220 (II)

System of equations:

\left\{ \begin{aligned} x + y &= 38 && \text{(I)} \\ 5x + 10y &= 220 && \text{(II)} \end{aligned} \right.

Divide both sides of equation (II) by 5 so our numbers become smaller

\left\{ \begin{aligned} x + y &= 38 && \text{(I)} \\ x + 2y &= 44 && \text{(II)} \end{aligned} \right.

Rearrange (I) to solve for y so that we can substitute into (II)

\begin{aligned} x + y &= 38 && \text{(I)} \\ y &= 38 - x \end{aligned}

Substituting this into equation (II) for the y:

\begin{aligned} x + 2y &= 44 && \text{(II)} \\ x + 2(38 - x) &= 44\\ x + 76 - 2x &= 44 \\ -x &= -32 \\ x &= 32 \end{aligned}

We have 32 five-dollar bills

======

If we want to finish off the question, use y = 38 - x to figure out number of $10 bills

y = 38 - 32 = 6

32 five-dollar bills and 6 ten-dollar bills

7 0
3 years ago
Students in 4th and 5th grade took a survey regarding their favorite cafeteria food. What percent of the students selected pizza
kirill [66]

Answer:

the answer to your question will be D, 20%

6 0
3 years ago
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