3 years ago

Please help I really don’t understand this

1 answer:

4 0

You input the values and the equation would end up as

-5 = -3/2 (6) + b

You use y = mx + b

Y is -5
M is the slope = -3/2
X is 6
B is the y intercept but that is not given

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the sum of three times one number, x, and five times a second number,y, is 77. if the sum of the two numbers is 19, find the two

HACTEHA [7]

Answer:

x=9, y=10. (9, 10). The two numbers are 9 and 10.

Step-by-step explanation:

3x+5y=77

x+y=19

------------------

3x+5y=77

-3(x+y)=-3(19)

---------------------

3x+5y=77

-3x-3y=-57

-------------------

2y=20

y=20/2

y=10

x+10=19

x=19-10

x=9

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3 years ago

WILL GIVE BRAINLIEST!!!!!

Svetlanka [38]

Commutative property because its the first part just moved around
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3 0

3 years ago

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At 10a.m the temperature was 71 degreesF. At 3 P.M the temperature was 86degrees F. Find the value of the slopes and explain wha

madreJ [45]

Values of slope = (86-71) / (3pm - 10 am) = 15 / 5 = 3

This value of the slope gives the average rise in temperature per hour.

6 0

3 years ago

If a vector pointing upward has a positive magnitude, a vector pointing downward has a negative magnitude. True or false?

Sidana [21]

Answer:

The statement is false.

Step-by-step explanation:

For any vector 'r' we have

$\overrightarrow{r}=x\widehat{i}+y\widehat{j}+z\widehat{k}$

The magnitude is given by

$|r|=\sqrt{x^{2}+y^{2}+z^{2}}..........(i)$

As we know that the upon squaring a term the result is always positive thus the term in right side of equation i is always positive no matter weather the terms (x,y,z) are positive or negative hence we conclude that magnitude of any vectorial quantity is always positive irrespective of it's direction.

8 0

3 years ago

1. 4 • (–3) • 5 <br> 2. (2.25 • 23) • 4 <br> 3. <br> 4. 5 • 12 • (–2)

Doss [256]

1. 4*(-3)*5 = -60
2. (2.25*23)*4 = 207
3. you did not post a problem here???
4. 5*12*(-2) = -120

7 0

4 years ago