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3 years ago

21x40=840, so 21x 42 = Use mental math

Mathematics

1 answer:

Bad White [126]3 years ago

8 0

Answer:

882

Step-by-step explanation:

mental math right ;)

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it cost $270 for three people to go fishing on a fishing trip how much does it cost for 10 people to go on a fishing trip

coldgirl [10]

Answer:

900$

Step-by-step explanation:

270/3= 90$ per person

90*10=900$ for 10 people

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2 years ago

Look at the figures. How can you prove these triangles are congruent?

NNADVOKAT [17]

Answer:

You can use the Side-Angle-Side Postulate.

Step-by-step explanation:

The Side-Angle-Side (or SAS) Postulate basically states that if two sides of two triangles and the included angle are congruent, the two triangles are congruent.

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2 years ago

You have total coins for a total of $. . You only have quarters and dimes. Let represent the number of quarters and represent th

Sonja [21]

Answer:

$Quarters = 41$

$Dimes = 18$

Step-by-step explanation:

Given

$Coins = 59$

$Worth = \$12.05$

$d = dimes$

$q = quarters$

Required

The number of each coin

The total coins can be represented as:

$d + q = 59$

$1\ quarter = \$0.25 \\ 1\ dime = \$0.10$

So, the worth of the coin is:

$0.25q + 0.10d = 12.05$

The equations to solve are:

$0.25q + 0.10d = 12.05$

$d + q = 59$

Make d the subject in: $d + q = 59$

$d =59 - q$

Substitute $d =59 - q$ in $0.25q + 0.10d = 12.05$

$0.25q + 0.10(59 - q) = 12.05$

$0.25q + 5.9 - 0.10q = 12.05$

Collect like terms

$0.25q - 0.10q = 12.05 - 5.9$

$0.15q = 6.15$

Solve for q

$q=\frac{6.15}{0.15}$

$q=41$

Substitute $q=41$ in $d =59 - q$

$d = 59 - 41$

$d = 18$

So:

$Quarters = 41$

$Dimes = 18$

5 0

2 years ago

True or False:

Brums [2.3K]

Answer:

true

I would appreciate if you would chose my answer as a brainliest answer

6 0

2 years ago

Read 2 more answers

Which conjunction or disjunction is equivalent to |t – 7| > 12?

Klio2033 [76]

$|t-7| > 12\ \ \ \Leftrightarrow\ \ \ (t-7>12\ \ \ \ \ or\ \ \ \ \ -(t-7)>12)\ /\cdot (-1)\\\\.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ t-7>12\ \ \ \ \ or\ \ \ \ \ \ \ \ \ \ \ t-7$

8 0

2 years ago