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3 years ago

PLEASE HELP 30 POINTS

Mathematics

2 answers:

Anvisha [2.4K]3 years ago

7 0

Hi there!

This is an isocele triangle, which means that both sides "CA" and "CB" are equal and that both angles "A" and "B" are equal.

Since we know that angle "A" is equal to 50°, then angle "B" is also equal to 50°.

We also know that all 3 angles in a triangle are equal to 180°.

Since angle "A" + angle "B" are equal to 100°, angle "C" has to be equal to 80° (because 50° + 50° + 80° = 180°).

Now that we know that angle "C" is equal to 80°, all you need to do is write an equation with the parentheses equal to 80 and then solve it by isolating "y" :

80 = 5y + 10

Subtract 10 from each side of the equation

70 = 5y

Divide each side of the equation by 5

14 = y

There you go! I really hope this helped, if there's anything just let me know! :)

VARVARA [1.3K]3 years ago

4 0

y = 14 !

hope this helps :)

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14 increased by 14 5/7

musickatia [10]

28 5/7
• Increased means addition
• Add the whole number first
• 14 + 14 5/7 is equal to 14 + 14 + 5/7
hope this helps x

3 0

3 years ago

What is the gross earnings for a person who has $26,480 in total sales,

zhuklara [117]

Answer:

$3103.6

Step-by-step explanation:

Given data

Total sales= $26,480

Returns and Allowances=$1250

Commission = 7%

Let us find the amount in commission earned

=7/100*26,480

=0.07*26480

=$1853.6

Hence the gross earnings

=1853.6+1250

=$3103.6

8 0

3 years ago

Which property would be useful in proving that the product of two rational numbers is ALWAYS rational? A) a b + c d = ad + bc bd

Mademuasel [1]

Answer:

Step-by-step explanation:

So we need to understand what is rational numbers?

Rational number which can be written under this form: $\frac{x}{y}$ when x any are both integers and y $\neq 0$

The question here is : Which property would be useful in proving that the product of two rational numbers. In math, when we talk about the product of at least two number, it implies to the multiplication in the operation.

Here, only answer C: $\frac{a}{b} *\frac{c}{d} = \frac{ac}{bd}$ with the condition $b\neq 0 and d \neq 0$ and a, b, c and d are integers. Product of two integers is always an integer..

3 0

3 years ago

Read 2 more answers

she sells 6adult tickets and 5 children tickets on the first day totaling $112.50 and on the second day she sells 8adult tickets

Leya [2.2K]

Answer:

Cost of adult ticket = $12.5

Cost of child ticket = $7.5

Step-by-step explanation:

Given:

Cost of 6 adult ticket and 5 child ticket = $112.5

Cost of 8 adult ticket and 4 child ticket = $130

Find:

Equation and solution

Computation:

Assume;

Cost of adult ticket = a

Cost of child ticket = b

So,

6a + 5b = 112.5....eq1

8a + 4b = 130 ......eq2

Eq2 x 1.25

10a + 5b = 162.5 .....eq3

eq3 - eq1

4a = 50

Cost of adult ticket = $12.5

8a + 4b = 130

8(12.5) + 4b = 130

Cost of child ticket = $7.5

7 0

3 years ago

A rectangular poster is to contain 722 square inches of print. the margins at the top and bottom of the poster are to be 2 inche

Delvig [45]

Let
x ----------> the height of the whole poster
y ----------> the width of the whole poster

We need to minimize the area A=x*y

we know that
(x-4)*(y-2)=722
(y-2)=722/(x-4)
(y)=[722/(x-4)]+2

so
A(x)=x*y--------->A(x)=x*{[722/(x-4)]+2}
Need to minimize this function over x > 4

find the derivative------> A1 (x)
A1(x)=2*[8x²-8x-1428]/[(x-4)²]

for A1(x)=0
8x²-8x-1428=0
using a graph tool
gives x=13.87 in

(y)=[722/(x-4)]+2

y=[2x+714]/[x-4]-----> y=[2*13.87+714]/[13.87-4]-----> y=75.15 in

the answer is
the dimensions of the poster will be
the height of the whole poster is 13.87 in
the width of the whole poster is 75.15 in

6 0

3 years ago