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ehidna [41]
3 years ago
11

Work out the value of 2a + ay when a= 5 and y= -3

Mathematics
2 answers:
inn [45]3 years ago
5 0
Just plug in a = 5, y = -3 in that!

2a + ay  = 2(5) + 5(-3) = 10 -15 = -5
thats it!
Klio2033 [76]3 years ago
3 0
Just plug the number for each letter it tell you plug 5 for letter a and then plug -3 for y 
2(5)+(5)(-3)
10-15
-5<span />
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Please help me solve this by substitution: <br> y=x+2<br> 3x+3y=6
VikaD [51]

Answer:

x = 0, y = 2

Step-by-step explanation:

  1. solve the equation for x

3x + 3(x + 2) = 6

2. Substitute the given value of x into the simplest equation y= x + 2

y = 0 + 2

3. Solve the equation for y

y= 2

4. The possible solution of the system is the ordered pair ( x, y)

( x, y) = ( 0, 2)

3 0
3 years ago
Which is the midpoint of the segment joining (12, 2) and (-5, – 7)?
Rainbow [258]

Answer:

m(x, y)=(\frac{7}{2} , -\frac{5}{2} )

Step-by-step explanation:

Midpoint of line segment is calculated as

m(x, y)=(\frac{x_1+x_2}{2} , \frac{y_1+y_2}{2} )  -----------(1)

Here

(x_1, y_1) = (12,2) \ \  and \ \ (x_2, y_2) = (-5, -7)

Substituting values in equation (1)

m(x, y)=(\frac{12-5}{2} , \frac{2-7}{2} )

m(x, y)=(\frac{7}{2} , -\frac{5}{2} )

3 0
3 years ago
A car starts from an initial velocity of 10m/s and accelerates at 2.5m/s².how long will it take the car to reach a speed of 40m/
PIT_PIT [208]
A=(v-u)/t
We know a=2.5, v=40, u=10, so:
2.5=(40-10)/t
2.5t=40-10
2.5t=30
Divide both sides by 2.5
t=12 It takes 12 seconds for the car to reach 40m/s

To find out how far it went, you do:
d=v+1/2 at^2
d=10+1/2(2.5)(12)^2
d=10+1/2(2.5)(144)
d=10+(1.25)(72)
d=10+90
d=100m

Hope this helps :)
7 0
3 years ago
Please help me i don't understand what my answer should be . i'll give brianliest jus please help
AnnyKZ [126]

Answer:

Step-by-step explanation:

1. ABE bc the both have a right angle. plus when added together, they make a square which means they are the same.

2. id remember how to do the second one i am so sorry

6 0
3 years ago
Read 2 more answers
Is KLMN below a rectangle?
8_murik_8 [283]
Should be C right? A rectangle demands that the diagonals are congruent
6 0
3 years ago
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