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rjkz [21]
3 years ago
11

What is the value of the expression 5b+3c-20+3b-15c+4 when b= 2 and c= -3

Mathematics
1 answer:
Molodets [167]3 years ago
3 0

Answer: 36

Step-by-step explanation:

5(2)+3(-3)-20+3(2)-15(-3)+4

10-9-20+6+45+4

-19+55

36

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Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 .
earnstyle [38]

Answer:

The simplified form is,

\boxed{\boxed{6\sqrt{5}+9\sqrt{7}}}

Step-by-step explanation:

The given expression is,

=2\sqrt{20}-3\sqrt{7}+2\sqrt{5}+4\sqrt{63}

=2\sqrt{4\times 5}-3\sqrt{7}+2\sqrt{5}+4\sqrt{9\times 7}

=2(\sqrt{4}\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(\sqrt{9}\times \sqrt{7})

=2(2\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(3\times \sqrt{7})

=4\sqrt{5}-3\sqrt{7}+2\sqrt{5}+12\sqrt{7}

=4\sqrt{5}+2\sqrt{5}+12\sqrt{7}-3\sqrt{7}

=6\sqrt{5}+9\sqrt{7}

8 0
4 years ago
Read 2 more answers
PLease help ill give brainliest
stepan [7]

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3 0
3 years ago
Eight more than the quotient of a number and 4 equals 5
Lady bird [3.3K]
Well we can put that word problem into a equation so, 8+x/4=5. Now what I would do is move the 8 to the other side, and since it moved to the other side it becomes a -8 so now we have x/4 = -3. Now I would multiply both side by 4 to get x = -12

Answer= X = -12
3 0
4 years ago
A tee-shirt company plans to hand out 1,830 coupons during May. It will hand out
Makovka662 [10]

Answer:

  A. O 5

Step-by-step explanation:

1830 ÷ 31 = 59.032258...

The first non-zero digit of the quotient is 5.

6 0
3 years ago
Thirty students in a science class each perform the same experiment that involves measuring the temperature of a solution. Which
marshall27 [118]

Answer:

the answer to you question is C

Step-by-step explanation:

if this helps lmk and have a brilliant day :D

7 0
3 years ago
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