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s2008m [1.1K]
3 years ago
8

Pls answer this with an explanation if you can

Mathematics
1 answer:
nika2105 [10]3 years ago
4 0

Answer:

B

Step-by-step explanation:

Decreased amount = 21.95 - 15.88 = 6.07

Sales percentage = 6.07/21.95 * 100 = 27.65% ≈ 28%

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In two or more complete sentences write and solve an equation for the situation and explain how you will solve the equation. Aft
notka56 [123]

Answer:

Grace weighed 167 pounds before she started her exercise program.

Step-by-step explanation:

Given,

Weight lost by Grace = 45 pounds

Weight of Grace after exercise weeks = 122 pounds

Let,

x represents the weight of Grace before she started the exercise program.

Loss means subtraction, therefore,

We will subtract the lost weight from original weight.

Original weight - Weight lost = Weight after exercise weeks

x - 45 = 122

Adding 45 on both sides

x - 45+ 45= 122+45

x=167   pounds

Grace weighed 167 pounds before she started her exercise program.

7 0
2 years ago
The markup of an MP3 player is $207.20. The markup rate is 60%. What is the cost?
ch4aika [34]

If markup is 60% of the cost, you have

... markup = 0.60×cost

... markup/0.60 = cost

... $207.20/0.60 = cost = $345.33

_____

If markup is 60% of the selling price, the other 40% is the cost. So, the cost is 40/60 = 2/3 of the markup.

... cost = (2/3)×markup = (2/3)×$207.20

... cost = $138.13

_____

Markup can be specified in terms of either selling price or cost. Those are the usual reference values; there could be others. When only the percentage is given, you don't have enough information to work the problem. You need to know what it is a percentage of. (Example problems in your text may tell you the expected interpretation.)

5 0
3 years ago
An architect wants to draw a rectangle with a diagonal of 15 centimeters. The length of the rectangle is to be 6 centimeters mor
S_A_V [24]

Answer:

She should make a rectangle with dimensions 14.4 cm by 4.2 cm.

Step-by-step explanation:

  • The diagonal of a rectangle is represented by \sqrt{length^2+width^2}.
  • Area of rectangle is = length×width
  • Perimeter of a  rectangle = 2(length+width).

Assume x be the width of the rectangle.

The length of the rectangle is to be 6 cm more than twice the width.

The length of the rectangle is= (2x+6) cm

Then the diagonal of the rectangle is \sqrt{length^2+width^2}

                                                             =\sqrt{(2x+6)^2+x^2}

                                                            =\sqrt{4x^2+24x+36+x^2}

                                                             =\sqrt{5x^2+24x+36} cm

According to the problem,

\sqrt{5x^2+24x+36}=15

Squaring both sides

\Rightarrow{5x^2+24x+36}=15^2

\Rightarrow{5x^2+24x+36}=225

\Rightarrow{5x^2+24x+36-225=0

\Rightarrow{5x^2+24x-189=0

⇒5x²+45x-21x-189=0

⇒5x(x+9)-21(x+9)=0

⇒(x+9)(5x-21)=0

⇒x+9=0  or,   5x-21=0

\Rightarrow x=-9, \frac{21}5

⇒x= -9, 4.2

Since the width of a rectangle can not negative.

So, x=4.2 cm

The width of rectangle is = 4.2 cm

The length of the rectangle is =(2×4.2+6)

                                                  =14.4 cm

She should make a rectangle with dimensions 14.4 cm by 4.2 cm.

8 0
3 years ago
5 plus 7 times 23 divided by 2<br><br> pls help! brainliest, thanks, rattings, etc.
9966 [12]

Answer:

85.5

Step-by-step explanation:

5+((7*23)/2)

first you do 7*23

second you do 161/2

finally you do 80.5 + 5

5 0
3 years ago
Find the missing angle:
sergey [27]

Answer:

40

Step-by-step explanation:

Going from left to right

We need to find the angle from the first triangle

The sum of the angles of a triangle is 180

80+25+x = 180

Combine like terms

105+ x = 180

Subtract 105 from each side

105-105+x = 180-105

x = 75

Then we have 3 angles that make a straight line and a straight line is 180

x + 50 + y = 180

75+ 50 + y = 180

Combine like terms

125 + y = 180

Subtract 125 from each side

125-125+y = 180-125

y = 55

We now have the triangle on the right

The angles add to 180

55+85+ ? = 180

Combine like terms

140+ ? = 180

Subtract 140 from each side

140+?  - 140 = 180-140

? = 40

4 0
3 years ago
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