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Igoryamba
3 years ago
13

Q=2u2 - 5 (d) Find the value of Q when u=-3

Mathematics
2 answers:
MaRussiya [10]3 years ago
7 0

Answer:

13

Step-by-step explanation:

13 is the right answer

Arte-miy333 [17]3 years ago
6 0

Answer:

Down below

Step-by-step explanation:

Q=2u^2-5\\u=-3\\Q=(2*-3)^2-5\\Q=(-6)^2-5\\Q=36-5\\Q=31

Note: wasn't sure if it was 2u^2 or 2u*2. tell me and i will change it. this also may be wrong.

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Find the product of (x − 5)^2.
omeli [17]
 1)    [B]:  " x²<span> − 10x  + 25 " .
_____________________________________________________
 2)   [D]:  " </span>x² +  10x + 25 " .
_____________________________________________________
<u>Note</u>:
_____________________________________________________
1)  (x − 5)² =  (x − 5) (x − 5) = x² − 5x − 5x + 25 = x² − 10x + 25 .

2) (x + 5)² =  (x + 5) (x + 5)  = x² + 5x + 5x + 25  = x² + 10x + 25 . 
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8 0
3 years ago
Read 2 more answers
Evaluate the expression.<br><br> 5/2−4⋅6+11<br><br> order of operations
valina [46]

Step-by-step explanation:

\frac{5}{2}  - 4.6 + 11

2.5-4.6+11

-2.1+11

8.9

1)division

2)addition because it cames before

3)subtraction

6 0
3 years ago
Someone please helpppp :,)
ryzh [129]

Answer:

262 in^{3}

Step-by-step explanation:

the equation for volume of a sphere is : \frac{4}{3}\pirx^{3}

so replacing the number of the radius into the equation, it would look like:

\frac{4}{3}\pir5^{3}

which gives you 523.59878 in^{3}

but since it's a hemisphere, you'd divide it in half, which gives you 261.79939.

since you're rounding off to the nearest whole number, you're answer is 262 in^{3}

4 0
3 years ago
An 18 in long rebar is driven into the ground until it touches an underground pipe. A backsight to a benchmark with an elevation
WARRIOR [948]

Answer:

398.71 ft

Step-by-step explanation:

Length of rebar = 18 inches  = 1.5 ft

Elevation  = 393.66 ft

Reading of backsight on Benchmark= 7.56 ft

Rod reading = 1.10 ft

<em>First step : determine height of Instrument been used</em>

= elevation + backsight on Benchmark

= 393.66 + 7.56 = 401.22 ft

<em>Elevation of top of rebar </em>

= 401.22  - 1.01  = 400.21 ft

Finally determine the elevation of the top of the pipe

= 400.21 - length of Bar

= 400.21 - 1.5 = 398.71 ft

6 0
3 years ago
what happens to a point that constantly varies in direction? A) It becomes a curve. B) It becomes a surface. C) It becomes a rig
TiliK225 [7]
I believe its A please tell me if I'm wrong its been a while
8 0
3 years ago
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