3 years ago

Which expressions are equivalent to -7z + (-3.5) + 4.5z + 3y - 2.5

Mathematics

2 answers:

SVEN [57.7K]3 years ago

6 0

Answer:

Step-by-step explanation:

-7z-3.5+4.5z+3y-2.5, grouping like terms

-7z+4.5z+3y-3.5-2.5

-2.5z+3y-6

lana66690 [7]3 years ago

4 0

The answer is C. -2.5z +3y -6

You might be interested in

Jordan paid $11.20 for 5 pears and 6 peaches. The cost of 3 pears is 2 peaches.

andre [41]

$2.24 per pair and $1.86 per peach

4 0

4 years ago

Decide whether the triangles are similar. If they are, write a similarity statement and state the reason justifying the similari

Contact [7]

Answer:

Step-by-step explanation:

Triangles are similar if their corresponding angles are congruent and corresponding sides are proportional.

8 0

3 years ago

Determine whether or not this is a function ANSWER ASAP

Anni [7]

Yes it is a function because x cant repeat if it’s a function. (x,y)

4 0

3 years ago

A car rental company's standard charge includes an initial fee plus an additional fee for each mile driven. The standard charge

Radda [10]

4 days later. ugh haha sorry. answer in the first ten min on time my butt

7 0

3 years ago

"Conservationists have despaired over destruction of tropical rain forest by logging, clearing, and burning." These words begin

krok68 [10]

Answer:

The answer is "(0.461 , 7.206)"

Step-by-step explanation:

In the given question some information is missing, that is data. so, the correct answer to this question can be defined as follows:

UnLogged:

$x_1=17.500\\s_1=3.529\\n_1=12$

Logged:

$x_2=13.667\\ s_2=4.500\\n_2=9\\$

formula of std error:

$\ std \ error =\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}$

$=\sqrt{\frac{3.529^2}{12}+\frac{4.500^2}{9}}\\\\=\sqrt{\frac{3.529^2\times 3+4.500^2\times 4}{36}}\\\\=1.8133$

Point differential estimation = $x_1-x _2$

$= 17.500-13.667\\=3.833$

For 90 percent t= 1.860 Cl & 8 df

error of margin E = $t\times \ std \ error$

$= 1.860 \times 1.8133\\= 3.373$

Lower bound =mean difference -E=0.461

Upper bound = mean difference+ E=7.206

In the above 90% confidence interval were the population mean= (0.461 , 7.206)

7 0

3 years ago