What is expression that uses partial products to multiply 8x64 in 5th grade math

2 answers:

7 0

8 x 64 = (8 x 60) + (8 x 4)= This uses the distributive law which is taught in 5th grade in school systems where I teach.

Pachacha [2.7K]4 years ago

6 0

Answer:

8 x 64 = (8 x 60) + (8 x 4)=

Step-by-step explanation:

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The variables y and x have a proportional relationship, and y = 15 when x = 3. What is the value of x when y = 4?

Akimi4 [234]

Answer:

$x=\frac{4}{5}=0.8$

Step-by-step explanation:

We have been given that the variables y and x have a proportional relationship, therefore, we can represent the relationship between x and y as: $y=kx$ , where k is proportionality constant.

Let us substitute x=3 and y=15 in above equation to find the value of k.

$15=k*3$

$k=\frac{15}{3}$

$k=5$

Now let us substitute k=5 and y=4 in our proportionality equation to find the corresponding value of x.

$4=5x$

$x=\frac{4}{5}$

$x=0.8$

Therefore, the value of x will be 0.8, when y equals to 4.

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4 years ago

Tony will spend at most $27 on gifts. So far, he has spent $14. What are the possible additional amounts he will spend?

AleksandrR [38]

Answer:

27-14=c

Step-by-step explanation:

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3 years ago

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Find the equation of the line passing through the points (3,7) and (-2,5)

r-ruslan [8.4K]

Answer:

The equation of the line passing through the points (3,7) and (-2,5) is y=⅖x+29/5

Step-by-step explanation:

Greetings !

$first \: find \: the \: slope \: m \\ m = \frac{(Y₂-Y₁)}{(X₂-X₁)} ..substitute \: vlues \\ m = \frac{(5 - 7)}{( - 2 - 3)} = \frac{ - 2}{ - 5} = \frac{2}{5} \\ y = mx + b \: to \: find \: equation \: of \: aline \\ between \: two \: poins and \: use \: \\ one \: of \: the \: two \: points \: lets \: take( - 2.5) \\ y = mx + b \\ 5 = \frac{ - 2}{5} ( - 2) + b \\ 5 = \frac{ - 4}{5} + b \\ 5 + { - 4}^{5} = b \\ \frac{25 + 4}{5} = b \\ b = \frac{29}{5} \\ finally \: equation \: of \: the \: line \: will \: be \\ y = \frac{2}{5} x + \frac{29}{5}$