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2 years ago

What is 2 1/2 + 4 2/5 in simplest form

Mathematics

1 answer:

Marysya12 [62]2 years ago

4 0

Answer:6 9/10

Step-by-step explanation:

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Simplify the expression -2+6.45z-6+(-3.25z)

erik [133]

Answer:

-8 + 3.2z

Step-by-step explanation:

when there is a "+" in front of an expression in parentheses, the expression remains the same
-2 + 6.45z - 6 - 3.25z
calculate the difference

-8 + 6.45z - 3.25z

collect like terms

-8 + 3.2z

8 0

2 years ago

HELP MATH NEED ASAP WILL GIVE BRAINLY TO CORRECT ANSWER!

rjkz [21]

1.the 2d chart is the best chose

5 0

3 years ago

Write the trigonometric expression in terms of sine and cosine, and then simplify.

katrin2010 [14]

Hello,

tan t /(sec t -cos t)= sin t/(cos t *(1/cos t -cos t))
=sin t/(cos t*(1-cos ²t)/cos t))
=sin t/sin² t=1/sin t [or=cosec t.]

3 0

2 years ago

Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall a

kherson [118]

Answer:

Yes, the background color appear to have an effect on the variation of word recall scores

Step-by-step explanation:

Given that results from scores on a test of word recall are given are as follows:

Two test scores have independent means and having normal distribution.

$H_0: Means are equal\\H_a: Means are not equal$

(Two tailed test at 5% significance level)

Group Group One Group Two

Mean 15.1400 12.4200

SD 5.9100 5.4200

SEM 0.9990 0.8910

N 35 37

The mean of Group One minus Group Two equals 2.7200

standard error of difference = 1.335

Hence t statistic = 2.0369

p value = 0.0454

Since p <0.05 we reject null hypothesis

Yes, the background color appear to have an effect on the variation of word recall scores

5 0

3 years ago

Which polynomial correctly combines the like terms and puts the given polynomial in standard form?

Minchanka [31]

Answer: $-5x^3y^3+8x^4y^2-7xy^5+x^2y^4+8x^6$

Step-by-step explanation:

$-5x^3y^3+8x^4y^2-xy^5-2x^2y^4+8x^6+3x^2y^4-6xy^5$

$-5x^3y^3+8x^4y^2+(-xy^5-6xy^5)+(-2x^2y^4+3x^2y^4)+8x^6$

$-5x^3y^3+8x^4y^2+(-7xy^5)+(x^2y^4)+8x^6$

$-5x^3y^3+8x^4y^2-7xy^5+x^2y^4+8x^6$

8 0

3 years ago

Read 2 more answers