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Vika [28.1K]
3 years ago
9

Christina estimated 188% of 91 by performing these steps. What did she do wrong?

Mathematics
1 answer:
Serga [27]3 years ago
8 0

Answer:

D) she incorrectly multiplyed 90 and 0.9.

Step-by-step explanation:

hope this helps! i got 100 on the quiz on edge

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The axis is symmetry for the function f(x) = -x^2-10+16 is x=-5.....
Aleksandr [31]
Axis of symmetry is the line x = h, where (h, k) is the vertex. Plug -5 into the equation to get k.

f(-5)=-(-5)^2-10(-5)+16=-25+50+16=41

(-5, 41)
5 0
3 years ago
6.5yd and 11yd<br> please find the area
Afina-wow [57]
Multiply length times width to find the area. 6.5x11= 71.5
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3 years ago
How to check that a number is divisible by 3 or not?? Need a best shortcut!!
Lilit [14]
If your number is quite large, like 3 digit or higher than that, then calculate the sum of their digits, if they will be divisible by 3, then the number is divisible, otherwise not.

For example. - "11055" 
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As 12/3 = 4 (Divisible)

In short, This number would be divisible.

Hope this helps!
5 0
4 years ago
Read 2 more answers
A tank holds 300 gallons of water and 100 pounds of salt. A saline solution with concentration 1 lb salt/gal is added at a rate
Shkiper50 [21]

The amount of salt in the tank changes with rate according to

Q'(t)=\left(1\dfrac{\rm lb}{\rm gal}\right)\left(4\dfrac{\rm gal}{\rm min}\right)-\left(\dfrac{Q(t)}{300+(4-1)t}\dfrac{\rm lb}{\rm gal}\right)\left(1\dfrac{\rm gal}{\rm min}\right)

\implies Q'+\dfrac Q{300+3t}=4

which is a linear ODE in Q(t). Multiplying both sides by (300+3t)^{1/3} gives

(300+3t)^{1/3}Q'+(300+3t)^{-2/3}Q=4(300+3t)^{1/3}

so that the left side condenses into the derivative of a product,

\big((300+3t)^{1/3}Q\big)'=4(300+3t)^{1/3}

Integrate both sides and solve for Q(t) to get

(300+3t)^{1/3}Q=(300+3t)^{4/3}+C

\implies Q(t)=300+3t+C(300+3t)^{-1/3}

Given that Q(0)=100, we find

100=300+C\cdot300^{-1/3}\implies C=-200\cdot300^{1/3}

and we get the particular solution

Q(t)=300+3t-200\cdot300^{1/3}(300+3t)^{-1/3}

\boxed{Q(t)=300+3t-2\cdot100^{4/3}(100+t)^{-1/3}}

5 0
3 years ago
Solve the equation. 3p – 1 = 5(p – 1) – 2(7 – 2p) 3 -9 -10 0
Sati [7]

Answer:


Step-by-step explanation:

3p – 1 = 5(p – 1) – 2(7 – 2p) 3 -9 -10  First Distribute

3p-1= 5p-5-42+12p-9-10  Simplify all like factors

3p-1=17p-66 Add 66 on both sides

3p+65=17p Subtract 3p from both sides

65=15p Divide both sides by 15

p=4.3

if it is a 100

3p – 1 = 5(p – 1) – 2(7 – 2p) 3 -9 -100  First Distribute

3p-1= 5p-5-42+12p-9-100  Simplify all like factors

3p-1=17p-156 Add 156 on both sides

3p+155=17p Subtract 3p on both sides

155= 15p divide both sides by 15

10.3=p

3 0
4 years ago
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