Mathematics Middle School

What is the value of the expression 5y2 + 4x when x = 2.5 and y = 3?

Question 5 options:

40


55


231.5


235

Answers

Answer 1

Answer:

it is 55 the 2nd one

5(9)+10=55

Answer 2

Answer:

40

Step-by-step explanation:

5 times 3 is 15

15 times 2 is 30

4 times 2.5 is 10

30 plus 10 equals 40

Related Questions

help please!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

18. slope =1/2 y-int= -6

19. slope=2 y-int= 8

Step-by-step explanation:

The slope for number 18 would be 1/2 and the y intercept would be -6

The slope for 19 would be 2 and I cannot see the picture of the intercept correctly, but I’m assuming it is 6

5. SLOPE need help like, ASAP, tysm

Answers

Answer:

Since it's a horizontal line the slope would be 0

Step-by-step explanation:

Horizontal Lines A horizontal line is a line whose equation is of the form =, where is a real number. All points that lie on the line have a -coordinate of . The slope of any horizontal line is zero, 0.

Matthew and Alicia wanted to know who could unpack their schoolbag faster. Matthew did it in 63.4 seconds and Alicia did it in 58.3 seconds. Who won? By how much?

Answers

Answer- Alicia

Alicia won because she did it in less time. 58.3 seconds would be a less amount of time than 63.4 seconds. Alicia won by 5.2 seconds.

Answer:

Matthew won because 63.4 is greater than 58.3 .Matthew won by 5.1 seconds because 63.4-58.3 =5.1  .Hope this helps :D

Real numbers x and y have an arithmetic mean of 18 and a geometric mean of sqrt(92). Find x^2 + y^2

Answers

The answer to this question is 34

Answer:

1112

Step-by-step explanation:

It took 48 minutes to drive downtown. An app estimated it would be less than that. If the error was 20%, what was the app’s estimate? Give detailed steps and explanation.

Answers

Pretty sure that the answer is 57 minutes and 10 seconds.

Answer:

38.4 minutes

Hope this helps!!!

Directions- Find the indicated term of each arithmetic sequence.

1. 40th term: 1.3, 3.8, 6.3,..

2. 21st term: -26, -15, -4, 7,...

3. 75th term: 1/3, 1, 5/3,...

Answers

Answer:

1. 98.8 2. 194 3. 49 2/3

Step-by-step explanation:

I found the pattern of each of them

Here is the math I did for the 1st one: 1.3(1st number)+2.5*39(pattern times one less than the term number you want)=98.8

This is actually the first time I have done this, so I this should help both of us!!! Me with learning more math, and you with doing your own math.

Write an EQUATION for the nth term of each arithmetic sequence
15,13,11,9,...

Answers

First you have to organize it like this
1 : 2 : 3 : 4
15 : 13: 11 : 9
If the sequence is decreasing then the nth term equation will start with a negative.try to see which will work -1,-2,-3,-4...
The answer is: x= -3n + 17

There are 9 people going on a trip. They purchased coach tickets for $160, and first class tickets for $1180. The total budget to spend was $4500. How many first class tickets did they buy? How many Coach tickets did they buy? Show your work.

Answers

Answer:

Step-by-step explanation:

Given

There are 9 people going on a trip

They purchased coach tickets =$160

first class tickets =$1180

total budget to spend = $4500

Let coach tickets=X

So first class tickets=9-x

160x+1180(9-x)=4500

160+10620-1180x=4500

160x-1180x=4500-10620

-1020x=-6120

X=6120/1020

X=6

So answer

Coach tickets=X=6

First class tickets=(9-x)

=3.

Explain how you can use properties of operations as strategies to evaluate each expression using mental math. Then evaluate the expression.
a. 0.6+12.7+1.4+2.3
b. 4.5 + 3.9 + (−0.5) + (−4) c . 8 35 − 9 12 + 1 25
d. 485+678−385

Answers

Answer:

a) 17

b)  3.9

c) 0.48

d) 778

Step-by-step explanation:

I could use properties of operations as strategies to evaluate each expression using mental math by using PEMDAS, for example i could use distributive property in some decimals.

D because it’s right not wrong

Simplify (6^-8)^4 Please help

Answers

Answer:

6⁻³²  (or 1/6³²)

Step-by-step explanation:

(6⁻⁸) ⁴

= 6 ⁽⁻⁸⁾⁽⁴⁾

= 6⁻³²  ( or in fraction form 1/6³²)

Answer:

[tex]\frac{1}{6^{32} }[/tex]

Step-by-step explanation:

If I read the question rights its = [tex](6^{-8} )(^{4})[/tex]

Please help!
Two equations are shown:

Equation 1:
3/4(x−12)=12
Equation 2:
3/4y−12=12
Solve each equation. Then, enter a number in each box to make this statement true.

The value of x is:

The value of y is:

Answers

Answer:

x=28

y=32

Step-by-step explanation:

X=28
Step by step:
X-12=16
X=16+12
X=28

Y=32
Step by step:
3y-48=48
3y=48+48
3y=96
Y=32

Brian spent $36 on fruit at the grocery store. He spent a total of $40 at the store. What percentage of the total did he spend on fruit?

Answers

Answer:

Just divide lol.

Step-by-step explanation:

I know this is right, but I don't really understand it and I need you to explain this to me, please?!

Answers

Answer:

x + 2x = 108

Step-by-step explanation:

Let x be the number of oranges sold on Thursday

The number of oranges sold on Friday is twice as many or 2 times x, 2x

The total sold on  the two days is 108.  Add the number sold on Thursday and Friday together and let it equal to 108

x + 2x = 108

So lets say you sold ‘x’ number of oranges on Thursday.On Friday you sold double,therefore ‘2x’. And altogether combining the sales on Thursday and Friday you sold 108 oranges. Therefore if we add the number of oranges sold on Thursday and Friday we will get 108 oranges.
The equation will be: x(number of oranges sold on Thursday) + 2x( number of oranges sold on Friday) = 108 (total number of oranges sold altogether)
x + 2x = 108

Hope it helped! Please mark me as Brainliest!

i need help with this one asap :{

Answers

It’s c hope it helps

HELP ASAP!! questions are in the pic

Answers

Answer:

1: 13 and 12

2: 9 and 10

3: 8 and 9

4: 5 and 6

5: 7 and 8

6: 4 and 5

Step-by-step explanation:

Hope this helps.

The other person is correct

Also need help on this

Answers

Answer is 0.5
-2 divided by -4 equals 0.5
and same thing for the rest of the equation.
The answer is 0.5
This is correct

The question is in the image. Thanks!

Answers

Answer:

Step-by-step explanation:

orange is wrong

dark blue is right

dark purple is right

both red are right

light purple is right

both light blue are wrong

both greens are wrong

Identify each of the following situations or equations as proportional or non-proportional and explain your reasoning

Answers

Answer:

B

Step-by-step explanation:

The correct answer is B

There are 96 red marbles and 144 green marbles in a bag. Jake takes 10 red marbles out. How many green marbles does he need to take out to maintain the original color ratio?

Answers

Answer:

230 i am pretty sure

Step-by-step explanation:

129 is the correct answer

Write 15 times the sum of 3 and 7 as an expression

Answers

Answer: 15(3+7)

Step-by-step explanation:

Answer:

(3+7) x 15 = 150

Step-by-step explanation:

Plz hurryy
Im in a rush

Answers

Answer:

D.) 280

Step-by-step explanation:

Answer:

D. 280.

Step-by-step explanation:

Add all of them up without cents.

Evaluate the expression for a = 3, b=1/2 , and c = 4.

8ab/2bc

Enter your answer in the box.

Answers

3

8(3)(1/2)=12
2(1/2)(4)=4
12/4=3

Answer:

3

Step-by-step explanation:

the original equation would be 8 x 3 x .5 divided by 2 x .5 x 4

making the numerator 12 and denominator 4. Simplifying that would be 3

Calculate the slope of a line that goes through the points: (5, 5) & (4, 2). Leave your solution as a simplified (improper) fraction.

Answers

Answer:

1/3

Step-by-step explanation:

Answer:

1/3 :)

Step-by-step explanation:

What percent of 400 is 45?

Answers

Answer:

11.25

Step-by-step explanation:

45% out of 400% 11.25

Help me with this please.

Answers

Answer:

the first one

Step-by-step explanation:

Answer

You Figure this out.

Step-by-step explanation:

Make a Graph put the points on the graph.

Which ever one has straight line that goes through the orgin.

Hope This helps

There are 91 days until the craft sale. Autum needs to make 817 rings before the sale. She wants to make about the same number of rings each day. About how many rings should she make each day? Explain how Autumn can use compatible numbers to estimate.

Answers

Autum needs 9 rings per day

anyone willing to help me with this? :')

Answers

Answer:

B

Step-by-step explanation:

B and then D its just an estimate kiddo you can guess

What is the value of the expression when a = 6, b = 4, and c = 8?

2a3b−c


A. 1

B. 3

C. 8

D. 12

Answers

the answer is D 12 because you need to multiply and subtract

Compare the perimeter and area of the original figure to the enlarged figure using proportions.

A small rectangle has a length of 2, and a width of 1. A large rectangle has a variable length of b, and width of 2. StartFraction enlarged side (2) over Original side (1) = StartFraction Enlarged perimeter (4 + 2 b) over Original perimeter (6) EndFraction. (StartFraction enlarged side (2) over Original side (1) EndFraction) squared = StartFraction Enlarged area (2 b) over Original area (2) EndFraction
Which statements describe true relationships? Check all that apply.
The enlarged area is 4 times the original area, which is the square of the scale factor.
The scale factor is One-half.
The enlarged perimeter is 2 times the original perimeter, which is the scale factor.
The perimeter is proportional to the scale factor and the area is proportional to the square of the scale factor.
The enlarged area and perimeter are equal.
plz help me I will mark brainliest and give thanks :D but only if you can it's fine if you don't know the answer.

Answers

Answer:

A,C,D

Step-by-step explanation:

I just got it right on edge2021

plz mark brainliest

Which number line models the solution set of -2x + 7 > 17?

Answers

Answer:

Last option

I hope this helps!

Last one is the answer i hope i am right
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