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juin [17]
2 years ago
9

What is -7 + -9 A. -16 B. -2 C. 2 D. 16​

Mathematics
2 answers:
nataly862011 [7]2 years ago
3 0

Answer:

is A. -16

Step-by-step explanation:

Irina-Kira [14]2 years ago
3 0

Answer: A. -16

Step-by-step explanation: −7+−9

−16

Because since its the same sign you keep it and add it.

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Identify any solutions to the system shown here.
OLga [1]
The answer would be B and D.  This can be found by putting the x and y values into the inequality to find whether or not they are true.

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3 years ago
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The product of - 6 and a number x, increased by 23 is – 163. What is<br>the number?​
vodka [1.7K]

Answer:

Hope this is correct

4 0
3 years ago
Given that u =&lt; 2,12 &gt;, and z =&lt; -7,5 &gt;
swat32

Using the dot product:

For any vector x, we have

||x|| = √(x • x)

This means that

||w|| = √(w • w)

… = √((u + z) • (u + z))

… = √((u • u) + (u • z) + (z • u) + (z • z))

… = √(||u||² + 2 (u • z) + ||z||²)

We have

u = ⟨2, 12⟩   ⇒   ||u|| = √(2² + 12²) = 2√37

z = ⟨-7, 5⟩   ⇒   ||z|| = √((-7)² + 5²) = √74

u • z = ⟨2, 12⟩ • ⟨-7, 5⟩ = -14 + 60 = 46

and so

||w|| = √((2√37)² + 2•46 + (√74)²)

… = √(4•37 + 2•46 + 74)

… = √314 ≈ 17.720

Alternatively, without mentioning the dot product,

w = u + z = ⟨2, 12⟩ + ⟨-7, 5⟩ = ⟨-5, 17⟩

and so

||w|| = √((-5)² + 17²) = √314 ≈ 17.720

7 0
2 years ago
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Answer:

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Hope it helps!

6 0
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\frac{165}{6}  = 27.5 lbs
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3 years ago
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