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zheka24 [161]
3 years ago
10

Evaluate the expression when x = 3/10 and y = - 2/15

Mathematics
2 answers:
Shkiper50 [21]3 years ago
7 0

Answer:

6/15-3/10

Step-by-step explanation:

3x2/15=6/15

Anit [1.1K]3 years ago
5 0

Answer:

1/10

Step-by-step explanation:

(3*2)/15 - 3/10 = 1/10 or 0.1

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Write down the exact value of:<br> a) cos 30°<br> b) sin 45°<br> c) tan 30°
Alexus [3.1K]

Answer:

a) 0.86602540378

b) 0.70710678118

c) 0.57735026919

Step-by-step explanation:

4 0
3 years ago
The measures of the angles of a triangle are shown in the figure below. Solve for x.
Daniel [21]
Answer: x = 11 degrees

Step by step explanation:
Triangle rule states that all angles of a trundle must equal to 180 degrees. So we have two known angles, therefore we can subtract them from the 180 degree total.
180-109-43
=28
Now to solve for x we have the equation
4x-16=28
We add 16 to both sides to isolate x
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6 0
3 years ago
Write an exponential equation in the form y = ab* whose graph passes through points (2, 18) and (5, 60.75).
DochEvi [55]

Let y=ab^x, as described in the problem statement. Plugging in x=2 and x=5 gives us the equations 18=ab^2 and 60.75=ab^5. Since a,b are nonzero, we divide the second equation by the first to get \frac{27}{8}=b^3, which means that b=\frac{3}{2}, after taking the cube root. Plugging this value for b into the first equation, we now have 18=a(3/2)^2=\frac{9a}{4}. Solving gives a=8, and our desired exponential equation is \boxed{y=8\left(\frac{3}{2}\right)^x}.

8 0
3 years ago
PLEASE! PLEASE! PLEASE! HELP!!!!! also please dont put silly answers i grinded for these points
Eddi Din [679]

Answer:

m <ADB = <u>90° + ½ r</u>

Step-by-step explanation:

explanation attached. brainliest would be nice.

6 0
3 years ago
on a certain planet, objects weight about 7/12 of what they weigh on earth. an object weights 13 5/12 pounds on the planet. solv
Cloud [144]
Although the concept here is physics, the solution is technically just algebra. You have two situations that are related to each other which can be expressed in equation form. Actually, the equation is already given which is <span>7/12 w= 13 5/12. So, basically, all you have to do is solve for w.

Let's simplify 13 5/12 first into an improper fraction.You do this by multiplying the denominator with the whole number and adding to it the numerator. This will be your new numerator, The denominator would still be 12. So, this is equal to (12*13 + 5)/12 = 161/2. Then,

(7/12) w = 161/12

By cross multiplication,

7*12*w = 161*12
w = 161/7 = 23

Therefore, w = 23 pounds which is the weight of the object on Earth.


</span>
8 0
3 years ago
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