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crimeas [40]
3 years ago
11

What is the expression that means the same as 7 less than the square of a number? A. 7-2x B. 7-2× C. 7-x2 D. x2-7 ​

Mathematics
2 answers:
damaskus [11]3 years ago
4 0
Answer d is correct!!!!!
Daniel [21]3 years ago
4 0

Answer:

D

Step-by-step explanation:

7 less than the square of the number means a number squared subtracted by 7, which would be D.

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A parking lot has 27 spaces total. if 9 of the spaces have cars in them, what is the ratio empty spaces to filled spaces?​
bonufazy [111]

Answer:

2 : 1

Step-by-step explanation:

27 total

9 filled

27 - 9 = 18 empty

18 : 9

2 : 1

8 0
3 years ago
Simplify: 8.2c−0.9+(5.4−18d+7.2c)÷0.06
maxonik [38]
8.2c−0.9+(5.4−18d+7.2c)÷0.06   Distribute:<span>  =<span><span><span><span><span><span><span>8.2c</span>+</span>−0.9</span>+<span>120c</span></span>+</span>−<span>300d</span></span>+<span>90

</span></span></span>   <span>=<span><span><span>(<span><span>8.2c</span>+<span>120c</span></span>)</span>+<span>(<span>−<span>300d</span></span>)</span></span>+<span>(<span><span>−0.9</span>+90</span>)</span></span></span><span>   =<span><span><span>128.2c</span>+<span>−<span>300d</span></span></span>+89.1</span></span> Answer:<span>=<span><span><span>128.2c</span>−<span>300d</span></span>+<span>89.1</span></span></span>

5 0
3 years ago
Each 7th grader brings $5 for charity, while each 8th grader brings in $8. The total collected is $1380. There are 10 more 8th g
Scilla [17]

Answer:

7th graders- 100 students

8th graders- 110 students

Step-by-step explanation:

Let the number of 8th graders be represented by x and 7th graders be represented by y

<u>Equation based on number</u>

There difference between 8th and 7th graders is 10 hence equation becomes

x-y=10

<u>Equation based on contribution</u>

While x contribute each $8 and y contribute each $5, the total contribution is $1380 hence the equation becomes

8x+5y=1380

<u>Combining equations</u>

Having the two simultaneous equations which are

x-y=10

8x+5y=1380

Solving the equations.

5x-5y=50

8x+5y=1380

------------------

13x=1430

x=1430/13=110

Therefore, 8th graders are 110. Since the 8th graders were 10 more than 7th graders, the 7th graders will be 110-10=100 students

6 0
3 years ago
Jamie bought 5/8 of wheat flour. He also bought 1/4 pound of white flour. How much flour did he buy
KonstantinChe [14]
7/8     you have to make 1/4 into 2/8  and 2/8+5/8=7/8







7 0
4 years ago
Read 2 more answers
Which equation represents the line that passes through points (1, -5) and (3,-17)
zvonat [6]

Answer:

A) y=-6x+1

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-17-(-5))/(3-1)

m=(-17+5)/2

m=-12/2

m=-6

y-y1=m(x-x1)

y-(-5)=-6(x-1)

y+5=-6(x-1)

y=-6x+6-5

y=-6x+1

8 0
3 years ago
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