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Cerrena [4.2K]
3 years ago
7

Find each product mentally. 7 times 3.8

Mathematics
1 answer:
lutik1710 [3]3 years ago
5 0
To do it mentally means to do it in your head

first do 7 * 3 = 21 in your head

than do 7 * 0.8 = 5.6 ( this might be hard to do in your head but you know 7*8 = 56 so add a decimal since it is 0.8 not 8 )

Add : 21 + 5.6 = 26.6

Final Answer : 26.6


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How do you solve 6) n2+7n+15=5 by factoring?
charle [14.2K]
First, you need to set the equation equal to zero:

n^2 + 7n + 10 = 0

Now we factor. We need to find two numbers that add up to 7 and multiply to 10. 

2 + 5 = 7
2 * 5 = 10

Now, we just need to write this as a polynomial:

(n + 2) (n + 5)
is our answer. 

Hope this helps!
8 0
3 years ago
What is the standard form of y=-3
Nady [450]

Answer:

Y=-3/2x+3

Step-by-step explanation:

No explanation.

5 0
2 years ago
When Raphael solved the system below by using the method of elimination, he changed the second equation to -8x-2y=-2 what proper
galben [10]
For this case, what we are going to do is use the following property:
 Multiply an equation by a scalar.
 In this case, the scalar will be:
 k = -2
 We have then that equation 2 will be:
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4 0
3 years ago
What is the smallest solution to the equation
yulyashka [42]

Answer:

The value of x is 6 and -6. The smallest value of x is -6

Step-by-step explanation:

2/3 x² = 24

solving this equation for finding the value of x.

Multiply both sides by 3/2

x² = 24 * 3/2

x² = 72/2

x² = 36

Now, to find the value of x taking square root on both sides

√x² = √36

x= ±6

So, the value of x is 6 and -6. The smallest value of x is -6

8 0
2 years ago
If a new soccer ball is labeled $22, what would the new price be if the sign above it says "68% off"? Round your answer to the n
Rom4ik [11]
7.04
.68 x 22 = 14.96
14.96 - 22 = $7.04
4 0
3 years ago
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