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SSSSS [86.1K]
3 years ago
8

Find the value of the expression 3x plus 4y when x= 4 and y= 5

Mathematics
2 answers:
Alisiya [41]3 years ago
8 0

Answer:

32

Step-by-step explanation:

Stella [2.4K]3 years ago
6 0

Answer:

32

Step-by-step explanation:

Substitute x and y for their numbers.

(3*4)+(4*5)

12+20

32

please thank me, rate, and mark as brainliest if you like!

;)

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Can someone help me with this question <br><br> 5 gallons 3 quarts + 4 gallons 2 quarts=?
Gekata [30.6K]

Step-by-step explanation:

5 gallons 3 quarts +4 gallons 2 quarts

5.3

+

4.2

=9.5 gallons

5 0
3 years ago
Read 2 more answers
Hallar la ecuación de la recta que pasa por el punto P(-3,-1) y por el punto de intersección de las rectas 2x − y = 9 y 3x − 7y
adell [148]

Answer:

y = -1

Step-by-step explanation:

The standard form of equation of a line is y = mx+b

m is the slope

b is the y intercept

Get the coordinate of the point of interception of the line 2x - y = 9 and 3x - 7y = 19

Make y the subject of the formula in both expressions

For 2x  - y = 9

- y = 9- 2x

y = 2x - 9

Similarly for 3x - 7y = 19

-7y = 19 - 3x

7y = 3x - 19

y = 3/7 x - 19/7

Equating both expressions

2x - 9 = 3/7 x - 19/7

Multiply through ny 7

14x - 63 = 3x - 19

14x - 3x = -19 + 63

11x = 44

x = 44/11

x = 4

Since y =2x - 9

y = 2(4) - 9

y = 8-9

y = -1

Hence the coordinate of intersection is at (4, -1)

Get the equation of the line passing through (-3, -1) and (4, -1)

Slope m = -1+1/4+3

m = 0/7

m = 0

Get the intercept

Substitute m = 0 and (-3, -1) into y = mx+b

-1 = 0(-3) + b

-1 = b

b = -1

Get the required equation

Recall that y = mx + b

y = 0x + (-1)

y = -1

Hence the required equation is y = -1

4 0
2 years ago
On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snoho
tamaranim1 [39]

Answer: the bridge is 11.025 m high

Step-by-step explanation:

Given that;

Time taken to hit the water t = 1.5 sec

height of bridge = ?

lets take a look at the equation of motion;

y(t) = y₀ + (1/2)at²

with initial velocity zero and we know that acceleration due to gravidity is 9.8m/s

we substitute

y(t) = (1/2)gt² = (1/2) × 9.8 × (1.5)²

y(t) = (1/2)gt² = (1/2) × 9.8 × (1.5)²

y(1.5) = 11.025 m

Therefore, the bridge is 11.025 m high

 

4 0
2 years ago
Calculate the perimeter of a regular pentagon which has a side of 9cm
Alisiya [41]
The answer is 45. there are 5 sides. each one is 9cm. 9*5= 45. 
hope this helps.
8 0
3 years ago
Please help will highly appreciate it
labwork [276]

Answer:

so I think your trying to find what c is right

if that so.that will be 90° that is an right angle all right angles are 90° I might be wrong because I'm not sure on what your trying to find but I hope I helped just a Little bit

.

<h2> sorry </h2>

8 0
3 years ago
Read 2 more answers
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