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taurus [48]
3 years ago
12

I have 5 questions. Please help.

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
3 0

Answer:

1. 1

2. 5/8

3. 3/4

4. 7/8

5. 5/8

Step-by-step explanation:

1. The denominators are the same, so just add the top numbers (the numerator), 1/7 + 6/7 = 7/7, which is 1.

2. The denominators are the same, so just add the top numbers (the numerator), 7/16+3/16=10/16. 10/16 can be divided by 2 to get 5/8.

3. 1/6=2/12. So, the new problem is 2/12+7/12. Add the numbers, and you get 9/12. Divide the top and bottom by 3, and your answer is 3/4.

4. 3/4=6/8. The new problem is 6/8+1/8. This is 7/8.

5. 1/4=2/8. The new problem is 2/8+3/8. 2+3 is 5, so your answer is 5/8.

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Elliott has some yarn that she wants to use to make hats and scarves. Each hat uses 0.2, point, 2 kilograms of yarn and each sca
sp2606 [1]

Answer:

Elliot will make 4 hats and 16 scarves

Step-by-step explanation:

Let x be the number of hats and y be the number of scarves Elliot will make.

Elliott wants to make a total of 20 items, then

x + y = 20

Each hat uses 0.2 kilograms of yarn, so x hats use 0.2x kilograms of yarn and each scarf uses 0.1 kilogram of yarn, then y scarves use 0.1y kilograms of yarn. Elliott wants to use twice as much yarn for scarves as for hats, then

0.1y = 2(0.2x)

Thus,

0.1y = 0.4x

y = 4x

Substitute it into the first equation:

x + 4x = 20

5x = 20

x = 4

y = 20 - 4

y = 16

Hence, Elliot will make 4 hats and 16 scarves

4 0
3 years ago
Chase purchased a sweatshirt from the clearance rack. The price of the sweatshirt after the discount is represented by the expre
Black_prince [1.1K]

Answer:B(0.75+0.25)x

Step-by-step explanation:

Is a discount of 0.75 was given the d real value of the sweatshirt would be a whole number

Which is 1-0.75=0.25

6 0
3 years ago
Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was
frozen [14]

Answer: 101.69

Step-by-step explanation:

Formula we use to find the z-score :-

z=\dfrac{x-\mu}{\sigma}    (1)

Given : \mu=90

\sigma=7

Daniel's z score : z= 1.67

Let x be the raw score for Daniel's exam grade, then substitute the values of \mu,\ \sigma\ and \ x in (1), we get

1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7\times1.67\\\\\Rightarrow\ x=11.69+90=101.69

Hence, the raw score for Daniel's exam grade = 101.69

3 0
3 years ago
I need help with geometry
Vilka [71]
If i’m not wrong the answer should be B
8 0
3 years ago
Read 2 more answers
Simplify the following:<br><br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B8x%5E2y%5E2-10xy%5E3-22y%7D%7B2y%5E2%7D" id="TexForm
alisha [4.7K]

Answer:

 \frac{4x^2y-5xy^2-11}{y}  

Step-by-step explanation:

\frac{8x^2y^2-10xy^3-22y}{2y^2}

=\frac{8x^2y-10xy^2-22y}{2y}

=\frac{4x^2y-5xy^2-11}{y}

[RevyBreeze]

5 0
3 years ago
Read 2 more answers
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