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DanielleElmas [232]
4 years ago
7

235+374= use rounding or compatible numbers to estimate the sum

Mathematics
1 answer:
vlada-n [284]4 years ago
7 0
Round to tens: 240 + 370 = 610
round to hundreds: 200 + 400 = 600

hope this helps
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She did not give and unknown value for iced tea
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A runner runs 92miles in 8minutes what is the unit rate
ss7ja [257]
I hope this helps you




if runner runs 92 miles in 8 minutes


? miles in 1 minute




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4 years ago
What is the equation of the parabola with focus (-1,-1) and directrix y=1?
Inessa05 [86]

Answer:

B

Step-by-step explanation:

Given focus as (h,k) and directrix as y = mx + b, the equation of a parabola is given as:

\frac{(y - mx - b)^2}{m^2 +1}=(x - h)^2 + (y - k)^2

Hence, from the given focus & directrix, we have:

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<em>We can plug them into the formula and arrange to get:</em>

<em>\frac{(y - mx - b)^2}{m^2 +1}=(x - h)^2 + (y - k)^2\\\frac{(y - (0)x - 1)^2}{0^2 +1}=(x - (-1))^2 + (y - (-1))^2\\\frac{(y-1)^2}{1}=(x+1)^2+(y+1)^2\\y^2-2y+1=x^2+2x+1+y^2+2y+1\\-2y-2y=x^2+2x+1\\-4y=x^2+2x+1\\y=-\frac{1}{4}x^2-\frac{1}{2}x-\frac{1}{4}</em>

<em />

<em>B is the correct answer.</em>

8 0
3 years ago
F-20f=21 what’s the answer
Virty [35]

\bold{[ \ Answer \ ]}

\boxed{\bold{F \ = \ -\frac{21}{19} }}

\bold{[ \ Explanation \ ]}

  • \bold{Solve: \ f \ - \ 20f \ = \ 21}

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

  • \bold{Add \ Similar \ Elements:f-20f=-19f}

\bold{-19f=21}

  • \bold{Divide \ Both \ Sides \ By \ -19}

\bold{\frac{-19f}{-19}=\frac{21}{-19}}

  • \bold{Simplify}

\bold{F \ = \ -\frac{21}{19}}

\boxed{\bold{[] \ Eclipsed \ []}}

5 0
4 years ago
What is 10³?<br> 10<br> 100<br> 1000
Tpy6a [65]

Answer:

1000

Step-by-step explanation:

3 0
3 years ago
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