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Reil [10]
3 years ago
5

I need help with this please !

Mathematics
2 answers:
S_A_V [24]3 years ago
8 0

Answer:

step 2 is wrong...-4-3=-7

Step-by-step explanation:

dimaraw [331]3 years ago
6 0

Answer:

1 or 2

Step-by-step explanation:

Both look wrong, but 1 seems worse. Sorry if this is wrong.

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In a lab, a substance is heated by 4°C each hour for 28 hours. What was the total change in temperature?
andre [41]

Answer:

112 difference in tempature

Step-by-step explanation:

multiply 4x28

6 0
3 years ago
a runner warms up for ten minutes and then takes seven minutes to run each mile. the total time after r miles in 45 minutes. how
Alika [10]
45=10+7x
35=7x
5=x

Answer: they ran 5 miles

Hope this helps:)
6 0
3 years ago
14.
svp [43]

Answer:

D. y= 2(x + 3)^2 - 3

Step-by-step explanation:

Rewrite in vertex form and use this form to find the vertex  

( h , k ) . ( 3 , − 3 )

Rewrite in vertex form and use this form to find the vertex  

( h , k ) . ( 3 , 3 )

Rewrite in vertex form and use this form to find the vertex  

( h , k ) . ( − 3 , − 3 )

Rewrite in vertex form and use this form to find the vertex  

( h , k ) . ( − 3 , − 3 )

7 0
3 years ago
A box has rectangular top, bottom, and sides. The top and bottom are square. The volume must be 7 cubic meters. Express the tota
SVEN [57.7K]

Answer:

Step-by-step explanation:

Given

Box has top and bottom as  square

Volume =7 m^3

let l ,b ,h be length, breadth and height of box

l=b because top and bottom as square

thus volume =b^2\cdot h

b^2=\frac{7}{h}

Total surface area(TSA)=2\left ( lb+bh+hl\right )

TSA=2\left ( b^2+bh+bh\right )

TSA=2\left (  b^2+2bh\right )

TSA=2\left ( \frac{7}{h}+2h\times \sqrt{\frac{7}{h}}\right )

TSA=2\left ( \frac{7}{h}+2\sqrt{7h}\right )

7 0
4 years ago
What is the value of |-8|
Rudik [331]

Answer: 8

Step-by-step explanation:

The two parallel bars mean absolute value meaning the positive value of that number. The positive value of -8 is 8. Note that positive number in an absolute value bars reamin the same.

More examples: |9|=9

Have a nice day! :D

4 0
3 years ago
Read 2 more answers
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