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3 years ago

If a rectangle has side lengths x+4 and 2x what is the perimeter and area of the rectangle?

Mathematics

1 answer:

pochemuha3 years ago

7 0

Answer:

Perimeter: 6x+8

Area: 2x²+8x

Step-by-step explanation:

Perimeter- the sum of all sides

So, you do x+4+x+4+2x+2x

Simplify that to- 2x+2x+2x+8

And also simplify that to- 6x+8

Area- length*width

So, it's (x+4)*2x

which is 2x²+8x

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Two new devices for testing blood sugar levels have been developed. How do these devices compare? You test blood sugar levels of

Ber [7]

Answer:

The matched pairs t test.

Step-by-step explanation:

You test blood sugar levels of 20 diabetics with both devices and use B. the matched pairs t test.

6 0

3 years ago

Y=3[x]+1 <br> Step by step

finlep [7]

y=3x+1

Use the slope-intercept form to find the slope and y-intercept

The slope-intercept form is y=mx+b

, where m is the slope and b

is the y-intercept.

y=mx+b

Find the values of m

and b using the form y=mx+b

m=3

b=1

The slope of the line is the value of m

, and the y-intercept is the value of b

Slope: 3

Y-Intercept: 1

Any line can be graphed using two points. Select two x

values, and plug them into the equation to find the corresponding y

values.

Choose 0

to substitute in for x

to find the ordered pair.

Replace the variable x

with 0

in the expression.

f(0)=3(0)+1

Simplify the result.

Tap for more steps...

The first point is (0,1)

(0,1)

Choose 1

to substitute in for x

to find the ordered pair.

Tap for fewer steps...

Replace the variable x

with 1

in the expression.

f(1)=3(1)+1

Simplify the result.

Multiply 3

by 1

f(1)=3+1

Add 3

and 1

f(1)=4

The final answer is 4

The second point is (1,4)

(1,4)

Create a table of the x

and y

values.

xy0114

Graph the line using the slope and the y-intercept, or the points.

Slope: 3

Y-Intercept: 1

xy0114

7 0

3 years ago

Please answer correctly

ivanzaharov [21]

Answer:

Answer is B=280

Step-by-step explanation:

6)/7=>>}{÷\¦^~<]||]>^¬)56)7899)/,))-557:

6 0

3 years ago

Find the value of the discriminant for all the equations. 1.5q2 +2q–3=0 2.3u2 -4u+1=0 3.7s2 +9s–4=0 4.6w2 –8w+5=0 5.5p2 +7p–3=0

kicyunya [14]

Answer:

Case 1: a = 1.5, b = 2, c = -3

$D = 22$

Case 2: a = 2.3, b = -4, c = 1

$D = 6.8$

Case 3: a = 3.7, b = 9, c = -4

$D = 140.2$

Case 4: a = 4.6, b = -8, c = 5

$D = -28$

Case 5: a = 5.5, b = 7, c = -3

$D = 115$

Case 6: a = 6.9, b = -5, c = 2

$D = -30.2$

Case 7: a = 7.2, b = 6, c = -4

$D = 151.2$

Case 8: a = 8.3, b = -3, c = 4

$D = -123.8$

Case 9: a = 9.9, b = 4, c = -7

$D = 293.2$

Case 10: a = 10.4, b = 8, c = -5

$D = 272$

Step-by-step explanation:

For all second order polynomial, the discriminant is equal to:

$D = b^{2}-4\cdot a \cdot c$

Case 1: a = 1.5, b = 2, c = -3

$D = 22$

Case 2: a = 2.3, b = -4, c = 1

$D = 6.8$

Case 3: a = 3.7, b = 9, c = -4

$D = 140.2$

Case 4: a = 4.6, b = -8, c = 5

$D = -28$

Case 5: a = 5.5, b = 7, c = -3

$D = 115$

Case 6: a = 6.9, b = -5, c = 2

$D = -30.2$

Case 7: a = 7.2, b = 6, c = -4

$D = 151.2$

Case 8: a = 8.3, b = -3, c = 4

$D = -123.8$

Case 9: a = 9.9, b = 4, c = -7

$D = 293.2$

Case 10: a = 10.4, b = 8, c = -5

$D = 272$

6 0

3 years ago

Read 2 more answers

1.5[3(14.5+7)-3]-7.4

nalin [4]

Answer:

84.85

Step-by-step explanation:

1.5[3(14.5+7)-3]-7.4

1.5[3*21.5-3]-7.4

1.5*61.5-7.4

=84.85

7 0

3 years ago