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2 years ago

Alannah, Colin and Hannah visit the park and collect conkers and acorns.

Mathematics

1 answer:

Alekssandra [29.7K]2 years ago

8 0

Answer:

acorns

Step-by-step explanation:

20x=9y

9/20 to 5/9

5/9 of the acorns collected are from Hannah

9/20 of the conkers collected are from Hannah

5/9 is larger than 9/20

Hannah collected more acorns

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Help with MATHEMATICS hw ASAp

Otrada [13]

#5. $5.50 + 0.89r would be less than 26.00.

#19. 10x + 4 = 30 would be correct.

#20. would be C.

Hope this helps.

7 0

3 years ago

Apply the laws of exponents, calculate the result and express the result in scientific notation, and as a decimal:

vesna_86 [32]

Consider the expression $(8.1\cdot 10^{-4})^2.$

Use main properties for powers:

1. $(a\cdot b)^m=a^m\cdot b^m;$

2. $(a^m)^n=a^{m\cdot n};$

3. $a^m\cdot a^n=a^{m+n}.$

Then

$(8.1\cdot 10^{-4})^2=8.1^2\cdot (10^{-4})^2=65.61\cdot 10^{-4\cdot 2}=65.61\cdot 10^{-8}=6,561\cdot 10^{-2}\cdot 10^{-8}=6,561\cdot 10^{-10}.$

The result in scientific notation is $6,561\cdot 10^{-10}.$

The result as a decimal is $0.0000006561.$

6 0

3 years ago

Forty percent of students at pine crest middle school have a school sweatshirt. There are 560 students at the school.

Oksi-84 [34.3K]

Answer: 224 students own a school sweatshirt.

Step-by-step explanation:

40% of 560 means 60% do not have one

0.60 is 60% as a decimal

560 x 0.60 = 336 students without a sweatshirt

560 - 336 = 224

4 0

3 years ago

A test consists of 10

Alecsey [184]

I didn't understand your question. please repeat

6 0

2 years ago

Solve the system using substitution: x = -4y and x + 5y = 2<br> Please and thank you.

Novay_Z [31]

Answer:

x = - 8, y = 2

Step-by-step explanation:

$x = - 4y......(1) \\ x + 5y = 2....(2) \\ plug \: x = - 4y \: in \: equation \: (2) \\ - 4y + 5y = 2 \\ y = 2 \\ plug \: y = 2 \: in \: equation \: (1) \\ x = - 4(2) \\ x = - 8\\$

7 0

3 years ago