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Mariulka [41]
3 years ago
11

Which of the following are solutions to the equation below? check all that apply. 4x^2+4x+1=9

Mathematics
1 answer:
AVprozaik [17]3 years ago
8 0
  • ±Answer:

X 1 = 1  ; X 2 = -2

Step-by-step explanation:

We clear the whole numbers, equal to (zero) and use the calculation formula of the quadratic function, according the image:

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Is 4 yards bigger than 13 feet
8_murik_8 [283]
1 yard = 3 feet

4 yards x 3 feet = 12 feet

12 feet is less than 13 feet


So False, 4 yards is <em>less than </em>13 feet

hope this helps
6 0
3 years ago
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If r is the radius of a circle and d is its diameter which of the following is an equivalent formula for the circumference c = 2
Ratling [72]

Answer:

C

Step-by-step explanation:

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3 years ago
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Find the degree of this polynomial<br> -7b2 + b + 6
nikdorinn [45]

The degree of a polynomial is the highest power.

In the polynomial we are given, the only power is 2 which makes it greatest.

Therefore, the degree is 2.

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4 0
3 years ago
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What is the area of this composite figure?<br>A. 135 cm2<br>B. 207 cm2<br>C. 249 cm2<br>D. 279 cm2
mariarad [96]

Answer:

249 cm^2

Step-by-step explanation:

This problem becomes easier if we subdivide the figure, find the areas of the resulting figures and then sum them up.

Draw a vertical line straight down from the edge marked "4 cm" towards the edge marked "18 cm."  The resulting rectangle on the left is 15.5 cm long and (18 - 7.5) cm wide, or 15.5 by 10.5 cm.  Its area is 162.75 cm^2.

Next, find the area of the rectangle on the right of the line we drew.  Its width is 7.5 cm and its height (15.5 - 4) cm, resulting in an area of 86.25 cm^2.

Last, add together these two subareas:  combine 86.25 cm^2 and 162.75 cm^2.  The total area of the composite figure is then 249 cm^2 (answer).

7 0
3 years ago
The sum of a number and twelve is twenty-one. What is the number? 21 n 12 8 9 10 33
Sonbull [250]

Answer:

9

Step-by-step explanation:

Subtract 1 2 12 12 from both sides of the equation + 1 2 = 2 1 + 1 2 − 1 2 = 2 1 − 1 2 2 Simplify Solution = 9

4 0
2 years ago
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