# catalina

Most popular questions and responses by catalina
1. ## chemistry

Determine the minimum volume of 6.40M HNO3 required to dissolve a 2.40g sample of Cu. 2NO3-(aq)+8H+(aq)+3Cu(s)-->2NO(g)+4H2)(l)+3Cu2+(aq)

asked on April 28, 2010
2. ## precalc

A windshield wiper on a certain model car pivots through an angle of 123°. The total arm and blade length is 24 inches. If the blade is 21 inches, what is the total area of windshield being cleaned by the wiper?

asked on November 7, 2016
3. ## physics

The drawing shows a skateboarder moving at 7.59 m/s along a horizontal section of a track that is slanted upward by 55.0 ° above the horizontal at its end, which is 0.741 m above the ground. When she leaves the track, she follows the characteristic path

asked on March 17, 2014
4. ## Calculus

Use a graphing calculator to graph f(x)=x^4-6x^3+11x^2-6x. Then use upper sums to approximate the area of the region in the first quadrant bounded by f and the x-axis using four subintervals.

asked on February 26, 2011
5. ## honors English

In "The Cross of Snow," the images of a halo, fire, and sunlight contrast with the- (which one??) A- image of a snowy, sun-capped mountain B- face of the speaker's dead wife C- image of a sunless mountain ravine D- memory of a happy marriage

asked on January 20, 2011
6. ## math

Q. The sum of the measures of two supplementary angels is 180 degrees. If one angel measures 45 degrees less than twice the measures of its supplement, find the measure of each angle? what steps do I need to take in order to get the measurments? A1 + A2 =

asked on January 28, 2007
7. ## math

2/3(7/8-4x)-5/8=3/8 I do not underdtand the steps?? Do I find a common denominator for all the fractions? Step 1. Clear the parentheses. Step 2. Multiply through by 24. Step 3. Solve for x. when I clear the parenthesis do I distribute 2/3 or do I just take

asked on January 21, 2007
8. ## math

Q. five times the sum of 3 and some number is 70. What is the number? I did the problem and got 13...but the answer is 11. I cannot figure out what I am doing wrong?? You must use parentheses when it says sum. 5(x +3) = 70 is correct set up. 5(x +3 )= 70

asked on January 26, 2007
9. ## Math

Kate saves 1/5 of her allowance and spends 2/3 of her allowance at the mall. what fraction of her allowance remains?

asked on September 25, 2012
10. ## civics

Q: which industries in the pacific region most affect the nation. can someone please take their time and please help me with this question? Thank you!!!

asked on September 23, 2012
11. ## math

Q. Naomi has a formula that allows her to convert Clesius temperatures to Farenheit temperatures. She needs a formula for converting Fahrenheit temperatures to Celsius tempertures. What advice can you give her? I am thinking that I just reverse the

asked on January 24, 2007
12. ## math

what is the most probable next term? 3 6 9 15 24 39 ? I do not understand? you add 3 then 3 then 6 then 9 then 15 I do not see the pattern...please help catalina the answer is 57

asked on June 4, 2007
13. ## math

problem remove parentheses and simplify 5x-(2x+7) I am getting 3x+7 is that wrong? The - sign carries through to both terms within the parentheses, so: 5x-2x-7 3x-7 I get it thank you

asked on January 19, 2007
14. ## math

Can someone please help me with this, -x/y = 2/9 I do not understand how to solve.... thanks -x/y = 2/9 multiply by 9y 9y*(-x/y)= 9y*(2/9) -9x = 2y can you take it from here? thank you

asked on January 18, 2007
15. ## math 7th grade

so is it okay if you explain to me why we multiply first and then divide???

asked on October 1, 2012
16. ## Math 7th grade

1) of the dolls in mo's doll collection, 1/5 have red hair. of these 3/4 have green eyes. what fraction of Mo's dolls collection have both red hair and green eyes? 2) ( Use measurement conversions) find 1/2 of 1/4 of a gallon. 3) Cheryl is organizing her

asked on October 1, 2012
17. ## 7th grade science

1) a classmate states that igneous rock must always become sedimentary rock next, according to the rock cycle. explain why this statement is incorrect. 2)why would granite have larger crystals than igneous rock s formed when lava cooled above the earth's

asked on September 25, 2012
18. ## math

If you add two-thirds of a number to the number itself, you get 40. What is the number? I do not know how to set it up? 2/3n + n = 40 Solve for n. I don't know but thak you sooooooooooo much for helping me on my mixed #'s!!!!!!!! Good Luck!!!!!! I don't

asked on February 7, 2007
19. ## math

Instructions: Tell whether each expression represents a positive number or a negative number when m and n are negative. problem: -n/-m If both m and n are negative, then both -m and -n (numerator and denominator) are positive. What does that tell you about

asked on January 14, 2007
1. ## social studies

A U.S nickname of the world

posted on February 29, 2016
2. ## Algebra

Gdhdhdhdhdjfjfjfjfjfjfjfjf

posted on October 20, 2015
3. ## Math

Álgebra if a supplement of an angle has a measure 78 less than the measure of the angle,what are the measures of the ángeles?

posted on September 29, 2015
4. ## Math 7th grade

oh sorry my bad thank you ms.sue :))

posted on October 1, 2012
5. ## Math 7th grade

so could you help me with number 2???

posted on October 1, 2012
6. ## Math 7th grade

I mean 80 not 45

posted on October 1, 2012
7. ## Math 7th grade

but why would you multiply and then divide?

posted on October 1, 2012
8. ## Math 7th grade

that would equal 45?

posted on October 1, 2012
9. ## 7th grade science

Please people i really need help with this question this assignment is due first thing in the morning and i still have a ton of other homewrok to do!!

posted on September 26, 2012
10. ## Math

okay I get it now. Thank you for your help :)

posted on September 25, 2012
11. ## Math

explain more in detail for me please

posted on September 25, 2012
12. ## Math

i don't understand why we have to add 1/5 + 2/3. can you

posted on September 25, 2012
13. ## civics

There are others who need help as well anyways. I don't want to keep them all waiting. Thank you so much!!!

posted on September 23, 2012
14. ## civics

if you cant help that is fine but i really appreciate your effort into trying to help me with this question!!! thank you soo much for your time. But i will somehow manage to solve this question. Thank you again!!!

posted on September 23, 2012
15. ## civics

u.s. civics

posted on September 23, 2012
16. ## civics

it doesnt say which country it just said the pacific region. :(

posted on September 23, 2012
17. ## Math

yes, parenthesis are necessary. why? following order of operations, -PEMDAS- parenthesis come first. this is telling you in the first problem that 3 is first multiplied by 5 to get 15, and then you add 2 to 15. =17 for the second one, first you have to add

posted on January 20, 2011
18. ## Chemistry Help(Calorimetry)

the number of calories needed to raise the temperature of 100 grams of water 10 degrees Celsius is the same as the number of calories needed to raise the temperature of 1,000 grams of water what amount?

posted on January 12, 2011
19. ## english composition

i want the answer!!!!!!!!!

posted on September 6, 2010
20. ## biology

data

posted on October 11, 2007