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3 years ago

Grace rode her bike 5 miles in 20 minutes. At this rate, how many miles can she ride her bike in 30 minutes? Plz help :)

Mathematics

1 answer:

ipn [44]3 years ago

3 0

Answer:

maybe like 7.5 miles

Step-by-step explanation:

if she rode 5 miles in 20 minutes than she rides for 30 more minutes than in 20 minutes of the 30 she rode 5 miles and my prediction is she will ride about 2.5 miles in 10 minutes

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Which pair shows equivalent expressions? 2 x + 10 = negative 2 (x minus 5) Negative 2 (x + 5) = 2 x minus 10 Negative 2 x minus

stellarik [79]

Answer:

C. –2x – 10 = –2(x + 5)

Step-by-step explanation:

Clearer choices:

2x + 10 = –2(x – 5)

–2(x + 5) = 2x – 10

–2x – 10 = –2(x + 5)

–2(x – 5) = –2x – 10

All choices have either:

–2(x – 5) for A and D

or –2(x + 5) for B and C

Simplify these expressions by expanding with the distributive property. Multiply the outside term "–2" with each term inside the brackets.

–2(x – 5)

= (–2*x) – (–2*5) Multiply each term by the coefficient

= –2x – (–10) Simplify the double negative to a positive

= –2x + 10 Expanded expression

This is not the same answer in A and D. They are not correct.

–2(x + 5)

= (–2*x) + (–2*5) Multiply each term by the coefficient

= –2x + (–10) Adding a negative is the same as subtraction

= –2x – 10 Expanded expression

This is the same answer for option C.

Therefore "C" is the answer.

8 0

3 years ago

Read 2 more answers

Which of these is equivalent to -x < 8?: x < 8 x < -8 x > 8 x > -8

adell [148]

Answer:

x>-8

Step-by-step explanation:

multiply both sides with -1

6 0

4 years ago

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The length of the base of an isosceles triangle is x. The length of a leg is 2x - 2. The perimeter of the triangle is 71. Find

Elanso [62]

Answer:

x = 15

Step-by-step explanation:

x + 2x - 2 + 2x - 2 = 71

Solve for x, you get 15.

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2 years ago

To make a specific hair dye, a hair stylist uses a ratio of 1 1/8 ounces of red tone, 3/4 ounces of gray tone, and 5/8 ounces of

natima [27]

Answer: To make 20 ounces of dye, we need 3 oz red tone, 6 oz of gray tone and 5 oz of brown tone.

To make 100 ounces of dye, we need 15 oz red tone, 30 oz of gray tone and 25 oz of brown tone.

Step-by-step explanation:

The amount of specific hair dye made by given ingredients= $1\frac{1}{8}+\frac{3}{4}+\frac{5}{8}$

$=\frac{9}{8}+\frac{3}{4}+\frac{5}{8}$

$=\frac{9+6+5}{8}=\frac{20}{8}=\frac{5}{2}\ oz$

Therefore , The amount of specific hair dye made by given ingredients= $\frac{5}{2}$ qz

Multiply reciprocal of $\frac{5}{2}$ to each ingredient to find the amount of each ingredient required to make 1 oz of specific hair dye.

To make 1 oz of specific dye, the amount of red tone needed $=\frac{3}{8}\times\frac{2}{5}=\frac{3}{20}\ oz$

Similarly, Gray tone= $\frac{3}{4}\times\frac{2}{5}=\frac{3}{10}\ oz$

Brown tone= $\frac{5}{8}\times\frac{2}{5}=\frac{1}{4}\ oz$

Now, multiply 20, to each

To make 20 oz of specific dye, the amount of red tone needed $=\frac{3}{20}\times20=3\ oz$

Similarly, Gray tone= $\frac{3}{10}\times20=6\ oz$

Brown tone= $\frac{1}{4}\times20=5\ oz$

To find each dye to make 100 ounces of dye, multiply 5 to the above amounts, [since $100=20\times5$ ]

To make 20 oz of specific dye, the amount of red tone needed $=15\ oz$

Similarly, Gray tone= $30\ oz$

Brown tone= $25\ oz$

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3 years ago

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Angelica is a sales representative for an applicator distributor she needs to make at least $5000 in weekly sales of a particula

Sauron [17]

Angelica needs to sell 20 TVs.

Steps:

Step 1: You divide 5,000 and 250.

5,000/250 = 20

Check: You multiply 250 and 20.

250 x 20 = 5,000

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3 years ago