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VARVARA [1.3K]
3 years ago
8

Which of the following expressions could be used to find the sale price of an item that costs d dollars if it is on sale for 30%

off?
Mathematics
1 answer:
Reptile [31]3 years ago
6 0

Answer:

d-30%d

Step-by-step explanation:

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Help me please send me a friend req
LenKa [72]

Answer:

4520 yards

Step-by-step explanation:

2 miles=3520

3520+1,000=4520

4 0
3 years ago
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PLEASE HELP<br> Solve. x^2+9x+2=0
Nataliya [291]

Answer:

x = (1/2) (-9 ± √73)

Step-by-step explanation:

Using completing the square method

x²+9x+2=0

x²+9x = -2   (complete the square by adding (9/2)² to both sides)

x²+9x + (9/2)² = -2 + (9/2)²

( x + (9/2) )² = -2+ (9/2)²

( x + (9/2) )² = -2+ (81/4)

( x + (9/2) )² = 73/4

x + (9/2)  = ± √(73/4)

x + (9/2)  = ± √(73) / 2

x = -(9/2) ± √(73) / 2  (factorize out (1/2) )

x = (1/2) (-9 ± √73)

8 0
3 years ago
How do you find the height of a trapezoid
9966 [12]
<span>To solve this question, you must divide the trapezoid into a rectangle and two right triangles. Using the Pythagorean Theorem, you would calculate the height of the triangle which is 4. The dimensions of the rectangle are 5 and 4, hence the area will be 20.</span>
6 0
3 years ago
Read 2 more answers
If AB = CA and m1 = 45°, what is m3?
navik [9.2K]

Answer:

B 45 degrees

Step-by-step explanation:

if AB and CA are = the M2 = 90 degrees

in an right triangle ware one angle is 90 degrees and one is 45 degrees the outer one will be 45 degrees  

the total of the angles in a triangle is 180 degrees so 180 - 90 = 90

90 - 45 = 45

so the remaining angle is 45.

4 0
2 years ago
A triangle has sides that measure 7 units, 6 units, and 9.22 units. What is the area of a circle with a circumference that equal
BabaBlast [244]

Answer:

39 units²

Step-by-step explanation:

the perimeter of triangle =

7+6+9.22 = 22.22 cm

=> the radius oh the circle =

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= 3.54

so, the area of the circle = π.r²

= 3.14 ×(3.54)²

= 3.14 × 12.53

= 39.34 => 39 units²

5 0
2 years ago
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