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hjlf
3 years ago
13

Angle A and angle B are complementary

Mathematics
1 answer:
Nikitich [7]3 years ago
4 0

Answer:

Step-by-step explanation:

∠A + ∠B  = 90°  {given they are complementary}

5x+ 15 + 30 = 90

5x + 45 = 90

5x = 90 - 45

5x = 45

x = 45/5

x = 9

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HACTEHA [7]
In order to know what the polygon is, you have to plot the coordinates. After plotting, it is obviously shown a form of a rectangle. After connecting the midpoints of the sides, it formed a (D) rhombus, not a kite.
8 0
3 years ago
Solve.<br> y=x - 7<br> 5+2y=7
lesantik [10]

Answer:

\huge\boxed{x=8;\ y=1\to(8;\ 1)}

Step-by-step explanation:

\left\{\begin{array}{ccc}y=x-7&(1)\\5+2y=7&(2)\end{array}\right\\\\\text{Substitute (1) to (2) and solve for x:}\\\\5+2(x-7)=7\qquad\text{use the distributive property}\\\\5+(2)(x)+(2)(-7)=7\\\\5+2x-14=7\\\\2x+(5-14)=7\\\\2x-9=7\qquad\text{add 9 to both sides}\\\\2x-9+9=7+9\\\\2x=16\qquad\text{divide both sides by 2}\\\\\dfrac{2x}{2}=\dfrac{16}{2}\\\\\boxed{x=8}

\text{Substitute it to (1):}\\\\y=8-7\\\\\boxed{y=1}

8 0
3 years ago
Read 2 more answers
Tereka and Emma each deposit money in savings accounts. The amount of money, in dollars, in Tereka’s account after x years is mo
Over [174]

Given:

Amount of money in Tereka’s account : T(x)=472(1.04)^x

Amount of money in Emma’s account : E(x)=485(1.09)^x

To find:

The difference between initial amounts Tereka and Emma deposit.

Solution:

Substitute x=0 in the given functions, to get the initial amount of money they deposit.

T(0)=472(1.04)^0

T(0)=472(1)

T(0)=472

So, the initial amount Tereka deposit is $472.

E(0)=485(1.09)^0

E(0)=485(1)

E(0)=485

So, the initial amount Emma deposit is $485.

Difference between the initial amounts Tereka and Emma deposit is

485-472=13

Therefore, the difference between initial amounts Tereka and Emma deposit is $13. Emma deposit $13 more than Tereka.

6 0
3 years ago
María drinks 400 ml of water every hour. How many hours will it take her to drink 2 L of water?
JulijaS [17]

Hello,

The correct answer is 5 Liters.

2 Liters of water = 2000 Milliliters.

If she drinks 400 Milliliters per hour, then you do 2000 ÷ 400 to work out the number of hours.

2000 ÷ 400 = 5

Hope this helps!!!! :)

5 0
3 years ago
X+2y=4 and -x+y=-7 using substitution method
masha68 [24]
1. x=4-2y

2.x=7+y






.......................……………….……………
6 0
3 years ago
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