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ira [324]
4 years ago
9

I need help with solving -7 4/7+(-3 2/5)​

Mathematics
1 answer:
OLga [1]4 years ago
5 0

Answer:

-10 24/35

Step-by-step explanation:

First you need a common denominator to add or subtract. The common denominator woulb be 35. Now you have -7 20/35-3 14/35 which equals to -10 24/35.

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Tell which equation you use to solve for one of the variables when solving the system by substitution: 2x + 3y = 5 or 4x - y =3
mixas84 [53]
You can using any equation you want to solve for one of the variables. For instance,  if you want to solve for x you turn one of the equations so y is by its self
<span>
2x + 3y = 5
 4x - y =3

I am going to use </span>4x - y =3
-y = -4x + 3
y = 4x -3
Now you can substitute 4x - 3 for y  in 2x + 3y = 5 and solve for x
2x + 3y = 5
2x + 3(4x - 3) = 5

8 0
3 years ago
What is the answer??
masha68 [24]

Can’t see the question clearly

6 0
4 years ago
@###GEOMETRY, SEE PHOTO! PLEASE HELP ASAP!####@
Dafna11 [192]
Since this is a right triangle, we can use our trigonometric functions to solve for x.

Since we know the adjacent side and hypotenuse, we will use cosine.

Based on the function \cos(x) = \frac{adj}{hyp}, we can solve for x. The adjacent side is 7 and the hypotenuse is 12. Plugging this in, we get \cos(x) = \frac{7}{12}.

Now, we must use our inverse trigonometric functions to solve for x:
\cos^{-1}(\cos(x)) = \cos^{-1}(\frac{7}{12})

The inverse cosine and cosine on the left side cancel, leaving you with:
x = \cos^{-1}(\frac{7}{12}) = \boxed{54.3^{\circ}}
8 0
4 years ago
1. If the discriminant of a quadratic equation is zero, what do you know about the type and number of roots of the quadratic equ
timofeeve [1]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
Simplify the expression. Please help, really stuck!!
andrew11 [14]
(-2y + 5 ) ( y+3) 
= -2y^2 -6y +5y +15 
= -2y^2 - y +15 
the answer is B 
3 0
4 years ago
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