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Shkiper50 [21]
4 years ago
10

Explain how 9*4 can help you find 9*8.

Mathematics
2 answers:
Naddika [18.5K]4 years ago
3 0
9x4 can help you find 9x8 because after you find your answer all you have to do is add 9 four more times to get the sum of 9x8.
Pavlova-9 [17]4 years ago
3 0
If you know that 9*4 is 36, then you multiply by two to get 9*8 which is 72, because 36 2=72
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Will mark brainliest:) helppppp -7x + y = -19 -2x+ 3y = -19 solve the system of equations
Luba_88 [7]

Answer:

X=2, Y=-15

Step-by-step explanation:

-7x+y=-19

-2x+3y=-19

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

-3(-7x+y)=-19

   -2x+3y=-19

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

21x-3y=57

-2x+3y=-19

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

19x     = 38

19x/19=38/19

x=2

now plug 2 into x of the second equation to get y=-15

7 0
4 years ago
27 + 5 x 6 A Little Problem With this so some help please?
Kay [80]

Answer:

57

Step-by-step explanation:

1) According to PEMDAS, <em>multiply </em>first: 27+ 5x6= 27+30

2) Then <em>add</em>: 27+30=57

3 0
4 years ago
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Find the equation for (0,4)and (7,-10 )
sweet [91]

Answer:

y = -2x + 4

Step-by-step explanation:

First find slope:

\frac{y_2-y_1}{x_2-x_1}=\frac{-10-4}{7-0}= \frac{-14}{7}=-2\frac{y_2-y_1}{x_2-x_1}=\frac{-10-4}{7-0}= \frac{-14}{7}=-2

We know equation of a line is y = mx + b, where m = slope and b = y-intercept, so we can plug in the slope:

y = -2x + b

The y-intercept of the equation is 4 because the coordinate (0, 4) is given. Therefore, the equation is:

y = -2x + 4

7 0
3 years ago
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BRAINLIEST AND FIVE STARS TO THE RIGHT ANSWER
GrogVix [38]
★ Sigma Operator ★

Option C is the correct answer of the above summation series

Description -

Upper limit of sigma - ∞ [ where to stop ]

Lower Limit - 10 [ Where to start ]

Argument = n²

Hence we'll obtain - 100 + 121 + ... ∞

8 0
4 years ago
What is the answer to this math problem -4.3g=25.8
SVETLANKA909090 [29]
You have to separate the coefficient, "-4.3" from the variable "g', by using the inverse operation then doing it to the other side. You would divide 25.8 by -4.3 to get -6 <--Answer
3 0
3 years ago
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