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Art [367]
3 years ago
7

Evaluate the expression 7x, if x = 11.

Mathematics
2 answers:
fredd [130]3 years ago
7 0

Answer:

77

Step-by-step explanation:

7 x 11

you replace x with 11 due to substitution rule

Anuta_ua [19.1K]3 years ago
6 0

Answer:

77

Step-by-step explanation:

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Which graph shows y=x^2+3x-4
Ivahew [28]

Answer:

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Step-by-step explanation:

x^2+3x-4 can be factored as (x+4)(x-1). When y=0, x must be -4 or 1 to satisfy the equations, and thus the roots of the graph are at x=-4 and x=1. When x=0, y=(4)(-1)=-4. The only graph that satisfies both of these requirements is the third/last one.

3 0
2 years ago
2. A man drove 240 miles south at the rate of 60 miles per hour. On the return trip, he drove the rate of 40 miles per hour. The
shutvik [7]

av =  \frac{v_{2} - v_{1}}{t_{2} - t_{1}}

t_{1} =  \frac{d}{v_{1}} =  \frac{240}{60} = 4 \: hours  \\ t_{2} =  \frac{d}{v_{2}}  =  \frac{240}{40}  = 6 \: hours

av =  \frac{v_{2} - v_{1}}{t_{2} - t_{1}}  =  \frac{40 - 60}{6 - 4}   =  \frac{ - 20}{2}  =  - 10

av  \: speed= 10 \\ av \: velocity =  - 10 \:  \: north

3 0
1 year ago
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1. The rectangle shown is dilated by a scale factor of 2.
stealth61 [152]
Well, I don't what your question is, but I will assume that you want the dimensions of the rectangle after its dilation. So, multiply the dimensions of the rectangle by 2 to make it dilated.
8 0
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