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photoshop1234 [79]
3 years ago
9

Selma spent 7/10 of her allowance on a new backpack. What percent of her allowance did she spend

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
4 0
She spent 70% of her allowance
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Find the area of the regular trapezoid. The figure is not drawn to scale. The top side is 4, the bottom side is 7, and both side
svp [43]
A regular trapezoid is shown in the picture attached.

We know that:
DC = minor base = 4
AB = major base = 7
AD = BC = lateral sides or legs = 5

Since the two legs have the same length, the trapezoid is isosceles and we can calculate AH by the formula:

AH = (AB - DC) ÷ 2
      = (7 - 5) ÷ 2
      = 2 ÷ 2
      = 1

Now, we can apply the Pythagorean theorem in order to calculate DH:
DH = √(AD² - AH²) 
      = √(5² - 1²)
      = √(25 - 1)
      = √24
      = 2√6

Last, we have all the information needed in order to calculate the area by the formula:

A =  \frac{(AB + CD)DH}{2}

A = (7 + 5) × 2√6 ÷ 2
   = 12√6

The area of the regular trapezoid is 12√6 square units.

7 0
3 years ago
The number of people who own smartphone to the number of people who owns a flip phone of 4:3 if 500 more people own a smartphone
almond37 [142]

2000 smartphones and 1500 flip phones

4-3=1

1x500=500

500x4=2000

500x3=1500

3 0
3 years ago
Please help with geomtry
crimeas [40]

Here are the answers you were looking for:

A) Yes

B) No

C) No

5 0
3 years ago
Pleaseee help me with these i did some but just wanna make sure I'm in the same page if its right. please explain how you got it
Sergeeva-Olga [200]
1. P = 2(9) + 2(4.5)
P = 18 + 9
P = 27 m

2. P = 5.2(2) + 1.3(2)
P = 10.4 + 2.6
P = 13 ft

3. P = 12.9(2) + 4.7(2)
P = 25.8 + 9.4
P = 35.2 cm
5 0
3 years ago
Can anyone help me? If f (x) = -2x +5, what is f (-3x) equal to?
LekaFEV [45]

Answer:

B

Step-by-step explanation:

Use the given functions to set up and simplify f(-3x)

substitute x with -3x

-2 (-3x) =6x    remember a - x - = +

6x +5

4 0
2 years ago
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