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vodka [1.7K]
3 years ago
6

Evaluate a + b when a = -15 and b = -7.

Mathematics
1 answer:
Archy [21]3 years ago
4 0

Answer:

-22

Step-by-step explanation:

both are negative so you add them as normal numbers but keep the negative

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Find the perimeter of the following isosceles triangle. show work
julsineya [31]

Answer

Find out the perimeter of the isosceles triangle.

To prove

As shown in the figure.

P(0,4) , Q(-2,0) and R(2,0) are the vertices of the triangle PQR.

Formula

Distance\ formula = \sqrt{(x_{2} - x_{1})^{2} +(y_{2} -y_{1})^{2}}

As P(0,4) and Q(-2,0)

PQ = \sqrt{(-2 - 0)^{2} +(0 - 4)^{2}}

PQ = \sqrt{4+16}  

PQ = \sqrt{20}\unit

In the isoceles triangle the two sides of the triangles are equal .

Therefore PQ = PR

PR = \sqrt{20}\unit

As Q(-2,0) and R(2,0)

QR = \sqrt{(2- (-2))^{2} +(0 - 0)^{2}}

QR = \sqrt{(4)^{2}}

QR = 16 unit

Perimeter\ of\ triangle PQR = \sqrt{20} +\sqrt{20} + 16

Perimeter\ of\ triangle PQR = 4\sqrt{5} + 16\ units^{2}


3 0
4 years ago
Company A has a sales position with a yearly salary of $42,000. Company B has a similar sales position with a slary of $39,000 p
Ugo [173]

Company A has a sales position with a yearly salary of $42,000. Company B has a similar sales position with a slary of $39,000 plus 1% conmission on yearly sales.

Let x be the amount of yearly sales

Company A has a sales position with a yearly salary of $42,000.

yearly salary = 42,000

Company B has a similar sales position with a salary of $39,000 plus 1% commission on yearly sales.

1% is 0.01

yearly salary = 39,000+ 0.01x

yearly sales is the salary at company A greater than the salary and conmission at company B

A > B

42000 > 39000+ 0.01x

We solve the inequality

39000+ 0.01x < 42000

Subtract 39000 on both sides

0.01x < 3000

divide by 0.01

x> 300,000

For yearly sales > $300,000, the salary at company A greater than the salary and commission at company B

8 0
3 years ago
pls answer ive asked this question three times now pls answer everything there are five problems smh i neeeeeeeeeeeeeeeeeeeeeeee
mafiozo [28]

Answer:

Ex1. X=-1

Ex2. 3rd choice

Step-by-step explanation:

Ex1. The only discontinuity in the domain is x=-1

Ex2. You just add values of x to those options and see which one applies

6 0
3 years ago
The perimeter of the rectangle she below is 24feet
maxonik [38]
This is really obvious but the answer is 4 feet.
6 0
3 years ago
Please answer this math question for me
vampirchik [111]

Answer:

D=90° E=103° F=77°

Step-by-step explanation:

D+90°=180°

D=90°

F+103°=180°

F=77°

E + F=180°

E=103°

6 0
3 years ago
Read 2 more answers
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