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Alex73 [517]
3 years ago
15

Maria claims that ( 4.2 × 10 6 ) ÷ ( 2 × 10 3 ) is equal to ( 2.1 × 10 2 ) . Which statement about Maria's claim is accurate?

Mathematics
1 answer:
Marina CMI [18]3 years ago
5 0
Can we get the questions pls
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What is the volume of this prism?<br><br> 23.9<br> 47.7<br> 9.0<br> 4.5
anyanavicka [17]
Your answer would be 23.85 but I presume they rounded up so it would be 23.9
4 0
2 years ago
H2 + 7h + 10 = 0<br> Help please
Leni [432]

Answer:

-2, -5

Step-by-step explanation:

h2 + 7h + 10 = 0

h^2 +7h + 10 = 0

h^2 +2h +5h + 10 = 0

h(h+2) + 5(h+2) = 0

h+2 = 0 or h+5 = 0

h = -2 or h = -5

4 0
3 years ago
If z=15, what would the expression z2 – 2z + 15 be equal to?
svet-max [94.6K]

Answer:

15

Step-by-step explanation:

z2 - 2z + 15

(15)2 - 2(15) + 15

30 - 30 + 15

0 + 15

15

5 0
2 years ago
Read 2 more answers
a metalworker has meal alloy that is 15% copper and another alloy that is 60% copper. how many kilograms of each alloy should th
iragen [17]
Let L be the low copper alloy and H be the high copper alloy.
We need 0.15L + 0.60H = 0.42 and L + H = 100

L=100 - H
Substituting this into the second equation for L, we get:
0.15(100-H) + 0.60H = 0.42(H+L)
15 - 0.15H + 0.60H = 0.42(H+100-H)
15 + 0.45H = 0.42(100)
0.45H = 42 - 15 = 27
H = 27/.45 = 60 lbs

Back substitution, L = 40 lbs.
4 0
3 years ago
Shuping and joshua had the same amount of money. Joshua paid $9.10 for a bag and had $16.25 left. Shuping bought a pen and had $
tiny-mole [99]

Answer:

$5.75

Step-by-step explanation:

Joshua paid $9.10 for a bag and has $16.25 left

Now let's find out how much Joshua had before spending on a bag. To do this, we simply sum up the cost of the bag and how much Joshua had lefyt

9.10 + 16.25

=$25.35

Since Joshua and Shopping had the same amount, Shuping also had $25.35

To get the cost of the pen, we subtract the amount Shuping had left after purchasing the pen

This gives;

25.35 - 19.60

=$5.75

8 0
3 years ago
Read 2 more answers
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