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hichkok12 [17]
4 years ago
7

Marcel made an error when he used the distributive property to solve the problem shown. Which sentence describes the error?

Mathematics
2 answers:
lana [24]4 years ago
7 0

Answer:

i Think it  B i an not sure

Step-by-step explanation:

LenKa [72]4 years ago
4 0
A.In Step 2, 90 should be multiplied by the quantity 10 – 12, not by 10.

correct:
90(10 - 12) = 90 · 10 - 90 · 12 or 90(10 - 12) = 90 · (-2)
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23. What is the value of x?
andre [41]

Answer:

9

Step-by-step explanation:

If PQ || to BC

Then by BASIC PROPORTIONALITY THEOREM:

\frac{8}{40}  =  \frac{x}{45}  \\  \\  \frac{1}{5}  =  \frac{x}{45}  \\  \\ x =  \frac{45}{5}  \\  \\ x = 9

6 0
3 years ago
Find the sum of -2 9/10 and -5 4/15. Then, in two or more complete sentences, explain the steps you used to add the mixed number
IRINA_888 [86]

Answer:

\frac{-215}{30}

Step-by-step explanation:

Given-2\frac{9}{10} \ and\ -5\frac{4}{15}

on solving this mixed fraction we get;

-\frac{29}{10}\ and\ -\frac{64}{15}

Now adding these fractions by same denominator method.

-\frac{29\times3}{10\times3} +[-\frac{64\times2}{15\times2} ]\-\frac{87}{30} +[-\frac{128}{30}]\ = -\frac{215}{30}

8 0
3 years ago
Read 2 more answers
Adult walleye have a length with a mean of 44 cm and a standard deviation of 4 cm, and the distribution of lengths is approximat
Sloan [31]
Mean, mu=44 cm
standard deviation, sigma = 4 cm
X=41

We calculate the Z-value for 41 cm
Z(41)=(41-mu)/sigma=(41-44)/4=-0.75

The probability that x>X
P(x>X)
=P(x>41)
=1-P(x<41)
=1-0.2266274 (from standard normal distribution tables for left-tail of Z=-0.75)
= 0.7733726

4 0
3 years ago
A regular hexagon has 18 sides calculate the size of each interior
Liula [17]

Answer:

160 °

Step-by-step explanation:

An alternative method is to use the exterior angle.

the sum of the exterior angles is ALWAYS 360 °

So you can find the size of the exterior angles of a regular polygon quite easily:

If there are 18 sides ( n = 18 ) , then each exterior angle is:

\frac{360}{n} =\frac{360}{18} = 20°

The sum of the exterior and interior angles is 180° because they are adjacent angles on a straight line.

∴ each interior angle is 180° - 20° = 160°

7 0
2 years ago
Estimate the quotient 5.94/3=198
Scilla [17]
The answer would be 200.

8 0
3 years ago
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