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3 years ago

Can someone please answer this please answer it correctly please show work please please please answer it correctly

Mathematics

2 answers:

Lesechka [4]3 years ago

7 0

Answer:

1.) C. 2 Pages

2.) B. 76 mph

3.) C. 35 cents

4.)?

5.)?

6.)B

7.) B

Step-by-step explanation:

1. 2 1/2 = 5/2 1 1/4 = 5/4 5/4 * 4/5 = 1 so it is a unit with one

5/2 * 4/5 = 4/2 or 2 (You found unit by multiply what you did to the unit, because what you do to one side you do to the other)

2. 3 1/2 = 7/2 7/2 * 2/7 7/2 = 266 multiply for unit price, other wise you don't know what the true mph is, now multiply the 266 by 2/7 because what you do to one side you do to the other

2/7 = 266/1 multiply numerators and denominators

2 * 266 = 532

7 * 1 = 7 now put it back as a fraction

532/ 7 simplify

532/7 = 76

76 mph

3. 1.75 = 1 3/4 = 7/4 7/4 = 5 price = bagels now multiply the 5 by 1/5 (reciprocal) so that you can figure out what the unit is

5 * 1/5 = 1

7/4 * 1/5 multiply numerators together and denominators together

7 * 1 = 7

4 * 5 = 20

7/20 = .35

35 cents

4. 5. I am not sure

6. Solve each of them

A. 12 6/10 =126/10 126/10 = 7 multiply both for 1/7 for unit price

7 * 1/7 = 1 126/10 * 1/7 multiply 126 * 1 = 126 10 * 7 = 70

126/70 = 1.80

B. 10.98 = 1098/100 1098/100 = 6/1

1098/100 * 6/1 Multiply so that the unit is right

1098/600 = 1.83

1.83 = 1 juice

C. 18.10 = 18 1/10 = 181/10 181/10 = 10 price = number of juice

181/10 * 1/10 = 181/100 multiply with 1/10 so that 10 is 1 (unit price)

$1.81 = 1 juice

D. 16 38/100 = 1638/100 1638100 = 9 multiply both sides by 1/9 so unit is 1

9 * 1/9 = 1

1638/ 100 * 1/9 1638/900 = 1.82

$1.82 = 1 juice

1.80 per juice is cheapest so it is B

B. 1 = $5 it is the unit so if you multiply by all the numbers on top it will equal the number in the row, none of the others do that

Alika [10]3 years ago

7 0

Answer:

Its A

Step-by-step explanation:

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Answer:

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3 years ago

If f(x)= 3x+1 is reflect across the y-axis; what would the slope & y-intercept be? *

Elden [556K]

Answer: f(x) = -3x + 1

So the slope is -3 and the y-intercept is 1

Step-by-step explanation:

This is because it’s across the y-axis so the y-intercept doesn’t change. Because it’s a reflection the slope just becomes the opposite of what it originally was, so in this case it will be -3

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2 years ago

Y varies directly as x. Y=42 when x=6. Find the value of y when x =15.

pentagon [3]

Answer:

y=120

Step-by-step explanation:

Y varies directly as x is written as

$y \alpha x$

introducing a constant

y=kx

from the question, when y=48, x=6

substitute it in the formula

48=6k

making k the subject by dividing through by 6

$\frac{48}{6} = \frac{6k}{6}$

k=48/6

k=8

put the value of k in the expression y=kx

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3 years ago

Angles ABC and DBE are vertical angles, with angle ABC = 4x, and angle DBE =( 2x+18)

Dmitrij [34]

Vertical angles are equal.
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Then, 2x = 18;
x = 18 ÷ 2;
x = 9 degrees;
The measure of angle DBE is 2 × 9 + 18 = 36 degrees.

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3 years ago

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2 years ago

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