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zloy xaker [14]
3 years ago
15

5x+2y=7 7x+2y=5 i need it right

Mathematics
2 answers:
atroni [7]3 years ago
8 0
5x+2y=7 7x-2y=5 its subtract not add
aleksandr82 [10.1K]3 years ago
7 0
I solved it in the image below. 

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(2,4) is perpendicular to y:2x
Luda [366]

Answer:

is a Step-by-step explanation:

combination

A selection in which order has no importance.A mathematical symbol, or combination of symbols, representing a value, or relation. Example:

2

+

2

=

4

.equation

A mathematical statement that says two expressions have the same value; any number sentence with an

=

.

ordered pair

Set of two numbers in which the order has an agreed-upon meaning, such as the Cartesian coordinates

(

x

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y

)

, where the first coordinate represents the horizontal position, and the second coordinate represents the vertical position.

solution

1. The value of a variable that makes an equation true.

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4 0
2 years ago
Simplifying Ratios<br> 20:10<br> 30:36<br> 54:12
netineya [11]

Answer:

Simplify

1. 20:10 = 2:1

2. 30:36 = 5:6

3. 54: 12 = 18:7

Step-by-step explanation:

Answer for Number 1

The GCF of 20 and 10 is 10

Divide both by the GCF, 10:

20 ÷ 10 = 2

10 ÷ 10 = 1

The ratio 20 : 10 can be reduced t by dividing both terms by the GCF = 10

20 : 10 = 2 : 1

7 0
3 years ago
Read 2 more answers
Construct a 99% confidence interval for the population standard deviation of white blood cell count (in cells per microliter). A
kogti [31]

Answer:

The correct option is 1.148 < σ < 6.015

Explanation:

The 99% confidence interval for the standard deviation is given below:

\sqrt{\frac{(n-1)s^{2}}{\chi^{2}_{\frac{0.01}{2} }} }

Where:

\chi^{2}_{\frac{0.01}{2} }=18.548

\chi^{2}_{1-\frac{0.01}{2}}=0.676

Therefore, the 99% confidence interval is:

\sqrt{\frac{(7-1)2.019^{2}}{18.548} }

1.148

Therefore, the option 1.148 < σ < 6.015 is correct

3 0
3 years ago
Solve for x and then find the measure of B
pogonyaev

Answer:

x=6

b= 126

Step-by-step explanation:

8x+78 = 2x+114

8x-2x = 114-78

6x=36

x=6

--------

b=2x6+114

b= 126

3 0
3 years ago
(k^8+8k^2+10k+21) / (k+7)
Serga [27]

Answer:

Step-by-step explanation:

\frac{k^8+8k^2+10k+21}{k+7} is already simplified.

5 0
2 years ago
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