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3 years ago

What error did anna make?

Mathematics

1 answer:

Lapatulllka [165]3 years ago

6 0

Answer:

The last option

Step-by-step explanation:

she did not change the sign of +6 to -6

the constant term should be -15 and not -3

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Please hurry

Olenka [21]

Answer:

B.8K-168/K-12

4 0

3 years ago

2. Order 3.3,3.19,3 1/5,3 1/3.

cricket20 [7]

2.
$3\frac15=3.2\\ 3\frac13=3.33333...$

$3.19, \ \ \ 3\frac15, \ \ \ 3.3, \ \ \ 3\frac13$

3.
$20\%\cdot1500\$=0.2\cdot1500\$=300\$$

4.
$\frac{600g}{3kg}=\frac{600g}{3000g}=\frac{600g}{5\cdot600g}=\frac15$
This fraction is $\frac15$

5.
$10^3+10^2+10+1=1000+100+10+1=1111$

6. $6.7\cdot5\$=33.5\$$

7.
$180-40\%\cdot180=180-0.4\cdot180=180-72=108$

8.
$9^2-4\cdot9=81-36=45$

9.
from 8.45am to 12.45pm - 4 hours
$\$15\cdot4=\$60$
I earn $\$60$

10.
48 minutes = 1 hour - 12 min
21.15 - 1 hour = 20.15
20.15 + 12 min = 20.27

11.
$34.1^oC-27.6^oC=6.5^oC$

12.
$8\frac14 \ h= 8h \ 15min$
$10.30pm+8h = 6.30am\\ 6.30am+15min = \boxed{6.45am}$
I get up at 6.45am

13.
$12\cdot108=1296$

14.
$\overline{x}=\frac{8.2+9.4+3.5+2.9}4=\frac{24}4=6$

15.
$48\cdot26=1248 \ \ \ - \ \ \ total \ amount \ of \ lolipops \ in \ 48 \ bags\\ 1248\cdot20g=24960g = \boxed{24.96kg} \ \ \ - \ \ \ total \ weight \ of \ the \ 48 \ bags\\$

8 0

3 years ago

HELP HELP !!!! PLEASE I NEED HELP WITH THIS PROBLEM !!!

Vesnalui [34]

This one is best done by elimination:

We need to start 4 meters away, so B is clearly wrong.

We first move towards Mr. Wilson (i.e. distance is decreasing) so A is wrong.

Our speed is faster on the way back, so the two sloped section must have differing slopes, so D is wrong.
(D also doesn't start at 4, it's wrong for two reasons.)

Only C is left.

We can check each part to make sure. First we start at 4m, then move away, then stay still (zero slope) for three seconds, then move back faster (higher slope). All parts check out ok.

3 0

3 years ago

Read 2 more answers

Find the Slope of lines passing through the points: (4,5) and (6,7)

kupik [55]

the answer is 0.6 you gotta divide and multiply

4 0

2 years ago

Simplified form please help thank you

Agata [3.3K]

$\dfrac{5^2}{2^{-2}}=5^2\cdot2^2=(5\cdot2)^2=10^2=100$

7 0

3 years ago