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White raven [17]
2 years ago
6

Help I am doing a unit test

Mathematics
1 answer:
Dominik [7]2 years ago
5 0

Answer:88i+16

Step-by-step explanation:

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7 less than rhondas score is 65
Y_Kistochka [10]

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x - 7 = 65

(x is rhonda's score)

Step-by-step explanation:

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3 years ago
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After school, Emily had a science club meeting for 40 minutes, followed by a choir rehearsal
aniked [119]

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3:15 pm

Step-by-step explanation:

(1:25 + 40 min) = 2:05 + 75 min= 3:15

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3 years ago
Easy Word Problem
Ann [662]

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D. 2.65 because it is the slope

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2 years ago
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The base of a triangle exceeds the height by 9 centimeters. If the area is 56 square centimeters, find the length of the base an
shepuryov [24]

Answer:

The height of the triangle is 7cm and the base is 16cm

Step-by-step explanation:

First of all we have to know the formula to calculate area of ​​a triangle

a = area = 56

b = base

h = heigth

a = (b * h)/2

we replace the known values and we make 2 equations

56cm² = (b * h)/2

b = h + 9cm

we replace b by (h + 9cm) in the first equation

56cm² = (h + 9cm * h)/2

56cm² * 2 = h² + 9h

0 = h² + 9h - 112cm²

we use bhaskara formula:

(-b (±) √ (b² - 4ac) ) / 2a

we replace with the known values

h = (-9 (±) √ (9² - 4*1*(-112) ) ) / 2*1

h = (-9 (±) √ (81 + 448) ) ) / 2

h = (-9 (±) √529) /2

h = (-9 (±) 23)/2

h1 = (-9 + 23) / 2

h1 = 14 / 2

h1 = 7

h2 = (-9 - 23) / 2

h2 = -32 / 2

h2 = -16

The height of the triangle is 7cm and the base is 16cm

8 0
3 years ago
If a shirt costs $40 and the amount of tax collected was $2 what is the sales tax rate?
scoundrel [369]

Answer:

5%

Step-by-step explanation:

To find the tax, we take the price times the tax rate

2 = 40* rate

Divide each side by 40

2/40 =rate

.05 = rate

Changing to percent form

5% = rate

7 0
3 years ago
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