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3 years ago

Describe how to model -3x + 7= 28 with algebra tiles

Mathematics

1 answer:

Masteriza [31]3 years ago

3 0

You would put three x`s with a negative sign and then you will add 7 positives and 28 positives

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I need help please! Step by step

nevsk [136]

The total length was 6 m.

One of the tables was 1.8 m

Subtract 1.8 from 6 to find the total length of the other two tables:

6 - 1.8 = 4.2m

The other two tables are the same size, so now divide 4.2 m by 2:

4.2 / 2 = 2.1

The other tables are 2.1 m long.

6 0

3 years ago

Can someone help me out thanks!!

vichka [17]

Answer:

x = 8

Step-by-step explanation:

16/x = x/4

x²= 16 × 4

x² = 64

x = √64

x = 8

Hope this helps.

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3 years ago

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What is 9 over 12 simplified

Slav-nsk [51]

Answer:

Step-by-step explanation:

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3 years ago

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PROBLEM SOLVING You are participating in an orienteering competition. The diagram shows the position of a river that cuts throug

Wewaii [24]

Answer:

The shortest distance is 2.2 miles

Step-by-step explanation:

we know that

The shortest distance you must travel to reach the river is the perpendicular distance to the river

step 1

Find the slope of the line perpendicular to the river

we have

$y=3x+2$

The slope of the river is m=3

Remember that if two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is -1)

therefore

The slope of the line perpendicular to the river is

$m=-1/3$

step 2

Find the equation of the line into point slope form

$y-y1=m(x-x1)$

we have

$m=-1/3$

$point(2,1)$

substitute

$y-1=-(1/3)(x-2)$

step 3

Find the intersection point of the river and the line perpendicular to the river

we have

$y=3x+2$ ------> equation A

$y-1=-(1/3)(x-2)$ -----> equation B

Solve the system by graphing

The intersection point is (-0.1,1,7)

see the attached figure

step 3

Find the distance between the points (2,1) and (-0,1,1.7)

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

substitute

$d=\sqrt{(1.7-1)^{2}+(-0.1-2)^{2}}$

$d=\sqrt{(0.7)^{2}+(-2.1)^{2}}$

$d=2.2\ miles$

6 0

3 years ago

(05.02 MC)

tankabanditka [31]

Answer:

there is no value to x in this system because you don't have a number for the variable y

Step-by-step explanation:

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3 years ago

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