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3 years ago

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Mathematics

2 answers:

STALIN [3.7K]3 years ago

7 0

Hope this helps! As long as you keep posting I’ll keep answering- always happy to help!

sweet-ann [11.9K]3 years ago

4 0

Oof I could never learn that stuff

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Matteo is following this recipe to make a cake.

Vika [28.1K]

Answer:

Answer vary: to make 3 cakes this is what Matteo needs

9 ounces of butter

12 ounces of sugar

15 ounces of flour

6 eggs

3 teaspoons (tsp) baking powder

Step-by-step explanation:

honestly in my opinion thats my answer but it might be wrong. you could add or multiply it, I added the ingredients 3 times but it’s more simple to multiply each by 3.

3 times 3 = 9

4 times 3 = 12

5 times 3 = 15

2 times 3 = 6

1 times 3 = 3

4 0

3 years ago

What is the solution to the equation below? -3 + sqrt 2x - 1 =8

sattari [20]

Answer:

$x=61$

Step-by-step explanation:

$-3+\sqrt{2x-1} =8$

$\sqrt{2x-1} -3=8$

Add 3 to both sides of the equation:

$\sqrt{2x-1}-3+3=8+3$

$\sqrt{2x-1}=11$

Solve the square root:

$\sqrt{2x-1}=11$

$2x-1=11^{2}$

$2x-1=121$

$2x-1+1=121+1$ {add 1 to both sides}

$2x=122$

$x=122/2$

$x=61$

hope this helps.......

3 0

3 years ago

Which THREE side lengths CAN NOT make a triangle

Norma-Jean [14]

Answer: 6m, 10m, and 21m

Step-by-step explanation:

The two smaller sides have to add to be greater than the third side. 6+10 is 16 which is smaller than 21.

5 0

3 years ago

Read 2 more answers

An athlete knows that when she jogs along her neighborhood greenway, she can complete the route in 10 minutes. It takes 20 minu

IgorLugansk [536]

Answer:

10 miles per hour.

Step-by-step explanation:

Let x represent athlete's walking speed.

We have been given that her jogging rate is 5 mph faster than her walking rate, so athlete's jogging speed would be $x+5$ miles per hour.

$\text{Distance}=\text{Rate}\cdot \text{Time}$

10 minutes = 1/6 hour.

20 minutes = 1/3 hour

While walking, we will get $D_{\text{walking}}=x\frac{\text{miles}}{\text{hour}}\cdot \frac{1}{3}\text{hour}$

$D_{\text{walking}}=\frac{x}{3}$

While jogging, we will get $D_{\text{jogging}}=(x+5)\frac{\text{miles}}{\text{hour}}\cdot \frac{1}{6}\text{hour}$

$D_{\text{jogging}}= \frac{(x+5)}{6}$

Since athlete is covering same distance while walking and jogging, so we can equate both expressions as:

$\frac{x}{3}=\frac{x+5}{6}$

Cross multiply:

$6x=3x+15$

$6x-3x=15$

$3x=15$

$\frac{3x}{3}=\frac{15}{3}\\\\x=5$

Therefore, athlete's walking speed is 5 miles per hour.

Jogging speed: $x+5\Rightarrow 5+5=10$

Therefore, athlete's jogging speed is 10 miles per hour.

3 0

4 years ago

This is Colby’s solution for the equation x^2-4x-5=0:

EleoNora [17]

Answer:

See below

Step-by-step explanation:

Colby made a mistake in the 4th line of his work, where he reduced the trinomial $x^2-4x+4$ into $(x+2)^2$ instead of reducing it to $(x-2)^2$ . He also did not square root both sides of the equation afterward before he made two seperate equations, leading to incorrect answers.

Continuing on from where Colby made his first mistake, this is how you would correctly solve the rest of the problem:

$(x-2)^2=9\\\\x-2=3\\\\x=5\\\\x-2=-3\\\\x=-1$

6 0

2 years ago