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3 years ago

Please help me with this!!

Mathematics

1 answer:

Anton [14]3 years ago

5 0

Answer:

Step-by-step explanation:

when there's a negative number as an exponent you flip the base number

so it would be 1/(10^3)

10^3= 1000

so it's 1/1000

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What is (4/9-7/15) divided by 13/10

Rufina [12.5K]

First find least common denominator to subtract.
9=(3)×3
15=(3)×5
3×3×5=45 is lcd
4/9=20/45
7/15=21/45
(20/45-21/45)=(20-21)/45=-1/45
-1/45÷13/10
multiply by reciprocal instead of dividing
-1/45×10/13=(1×10)/(45×13)

-10/585

6 0

3 years ago

May someone help me please. Solve for x and then find the indicated length. Pleaseee

Marina86 [1]

Answer:

Step-by-step explanation:

3x + 4 = x + 12 [The straight line on the segments AB and BC indicate that they are the same length]

2x = 8 [Subtract x and 8 from both sides]

x = 4 [Divide both sides by two]

Length AB is equal to (3x + 4) as indicated by the diagram. Substituting x = 4, (3 * 4) + 4 = 16

4 0

3 years ago

Cory earns $20 for every lawn he mows and $9 for every hedge he trims. He uses the expression 20x + 9y to keep track of his earn

Nina [5.8K]

Part A: The coefficients are 20 and 9 and variables in the expression are x and y.
Part B: The number of terms are two in the expression, they are 20x and 9y,as they are separated by an addition sign.
Part C: 9y term in the expression shows the total earned from trimming hedges.

7 0

4 years ago

Your third-grade classroom has 32 boys and girls. Two-thirds of the boys and three-fourths of the girls are going on a field tri

adelina 88 [10]

Answer: The ratio of boys to girls would be 3 : 5 .

Step-by-step explanation:

Since we have given that

Number of boys and girls = 32

Fraction of boys are going on a field trip = $\dfrac{2}{3}$

Fraction of girls are going on a field trip = $\dfrac{3}{4}$

Number of children left = 9

Let the number of boys be 'b'.

Let the number of girls be 'g'.

According to question, it becomes ,

$b+g=32------------(1)\\\\32-9=\dfrac{2}{3}b+\dfrac{3}{4}g\\\\23=\dfrac{2b}{3}+\dfrac{3g}{4}-------------(2)$

From eq(1), we get that g = 32-b

So, it becomes,

$\dfrac{2}{3}b+\dfrac{3}{4}(32-b)=23\\\\\dfrac{2}{3}b+24-\dfrac{3}{4}b=23\\\\\dfrac{2}{3}b-\dfrac{3}{4}b=23-24=-1\\\\\dfrac{8b-9b}{12}=-1\\\\\dfrac{-b}{12}=-1\\\\b=-1\times -12\\\\b=12$

so, number of girls would be 32 - b = 32 - 12 = 20

So, Ratio of boys to girls in class would be 12 : 20 = 3 : 5.

Therefore, the ratio of boys to girls would be 3 : 5 .

7 0

4 years ago

Are 12/16 and 6/9 equivalent? Explain your answer.

Reptile [31]

Answer:

Step-by-step explanation:

Times the numerator and denominator by 2. 6 does turn into 12, but 9 doesn't turn into 16. Therefore, these fractions are not equivalent.

8 0

3 years ago