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nadezda [96]
3 years ago
11

Help me ill mark u brainliest xd

Mathematics
2 answers:
AlexFokin [52]3 years ago
6 0
20 x 42= 840
So the area would be 840 mm^2.
castortr0y [4]3 years ago
4 0
The area would be 840 because you multiply 42 and 20 .
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Evaluate and simplify the expression when a = 3 and b = 2. 3b-2(1 - b) a - 2 II [ ? ] Enter Copyright © 2003.2010​
tatuchka [14]

Correct question:

Evaluate and simplify the expression when a = 3 and b = 2,

given expression =  3b-2(1 - b)a - 2

Answer:

3b-2(1 - b)a - 2 at the given values is 10.

Step-by-step explanation:

Given;

3b-2(1 - b)a - 2

The expression is simplified as;

3b-2(1 - b) a - 2 = 3b - 2a(1 - b) - 2

                         = 3b - 2a + 2ab - 2

When a = 3 and b = 2; then, substitute these values in the simplified expression above;

3b - 2a + 2ab - 2 = 3(2) - 2(3) + 2(3 x 2) - 2

                            = 6 - 6 + 12 - 2

                            = 10

Therefore, 3b-2(1 - b)a - 2 at the given values is 10.

8 0
3 years ago
Find the following GCD and LCM: (3.a) GCD(343,550), LCM(343, 550). (3.b) GCD(89, 110), LCM(89, 110). (3.c) GCD(870, 222), LCM(87
Ierofanga [76]

Answer with Step-by-step explanation:

(3.a) GCD(343,550), LCM(343, 550).

343=7×7×7

550=5×5×2×11

GCD(343,550)=1

LCM(343,550)=7×7×7×5×5×2×11=188650

(3.b) GCD(89, 110), LCM(89, 110).

89=1×89

110=5×2×11

GCD(89, 110)=1

LCM(89, 110)=89×5×2×11=9790

(3.c) GCD(870, 222), LCM(870, 222).

870=2×3×5×29

222=2×3×37

GCD(870, 222)=2×3=6

LCM(870, 222)=2×3×5×29×37=32190

5 0
4 years ago
Find −5 5/6÷(−4 9/10). Write your answer as a mixed number in simplest form.
uranmaximum [27]

Answer: 1\dfrac{4}{21} .

Step-by-step explanation:

Given problem : \left(-5\dfrac{5}{6}\right)\div\left(-4\dfrac{9}{10}\right)

First we convert mixed fraction into improper fractions as

-5\dfrac{5}{6}=-\dfrac{5\times6+5}{6}=-\dfrac{30+5}{6}=-\dfrac{35}{6}\\-4\dfrac{9}{10}=-\dfrac{10\times4+9}{10}=-\dfrac{40+9}{10}=-\dfrac{49}{10}

Now , plug these values in the given expression , we get

\left(-5\dfrac{5}{6}\right)\div\left(-4\dfrac{9}{10}\right)=-\dfrac{35}{6}\div\left(-\dfrac{49}{10}\right)\\\\=\dfrac{-35}{6}\times\dfrac{-10}{49}\ \ \ [\text{By Property of fraction}]\\\\=\dfrac{350}{294}\\\\=\dfrac{25}{21}=1\dfrac{4}{21}

Hence, the answer is 1\dfrac{4}{21} .

8 0
3 years ago
Sandy receives a $35,000 salary for working as a chef. If Sandy spends approximately 4% of her salary on expenses each year, the
Harrizon [31]

Answer:

$1400

Step-by-step explanation:

Salary of a Sandy working as a Chef= $ 35000

Percentage of a salary spent on expenses= 4%

Amount of money spent on expenses= 4 % of $35000

Amount of money spent on expenses=  $1400

Hence he spent $1400 on expenses

Hence, the correct answer is $1400

3 0
3 years ago
Please help this is my last try
kykrilka [37]
The correct answer is B: Humid air has higher pressure because of the heaviness of water.  Hope this helps!!
7 0
3 years ago
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