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IRINA_888 [86]
2 years ago
7

-3x-2+7x=10 please help

Mathematics
2 answers:
ozzi2 years ago
8 0

Answer:

-3

Step-by-step explanation:

-3x-2+7x=10

combine like terms

-3x+7x=10+2

-4x=12

divide

-4x/-4=12/-4

x=-3

Volgvan2 years ago
4 0

Answer:

4x=12<=>x=3

Step-by-step explanation:

-3x+7x=4x

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The cost of 3 tacos and 1 soda is $7. The costof 4 tacos and two sodas is $10. What is the cost of one taco
statuscvo [17]

Answer:

cost of tacos=$2

cost of soda=$1

Step-by-step explanation:

x=price of tacos

y=price of soda

3x+y=7 --> y=7-3x

4x+2y=10 --> y=5-2x

5-2x=7-3x

x=2

y=5-2(2)=1

4 0
3 years ago
Name the shape.<br>Help nowwww​
dezoksy [38]

Answer:

The shape has 6 angles and 6 sides

Step-by-step explanation:

therefore it is a hexigon as hexigon is  a polygon of six angles and six sides.

3 0
2 years ago
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If triangle CDE is dilated by a scale factor of 1/5 with a center of dilation at vertex E, what is the area of triangle C'D'E'?
timurjin [86]
The correct answer would be Choice B: 4 square units.

When the scale factor is 1/5, that means the lengths of the sides are 1/5 of the original size. So instead of having a base of 20 and height of 10, the new triangle has a base of 4 and a height of 2.

The area of the triangle is: (4 x 2) / 2 = 4
8 0
3 years ago
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In a random sample of n1 = 162 males, there are x1 = 63 people that have blue eyes. In a random sample of n2 = 333 females, ther
sesenic [268]

Answer:

z = 2.1784 > 1.96,

Reject the null hypothesis

Step-by-step explanation:

For the males:

n1  = 162, x1 = 63

P1 = x 1/ n1 = 0.3889

For the Females:

n2 = 333,

x2 = 97

P 2 = x2/n2

= 0.2913

P 1= P2 Null hypothesis

P 1 is not equal to P 2 alternative hypothesis

Pooled proportion:

P= (x1 + x2) /( n1+ n2)

= (63 + 97) / (162 + 333)= 0.3232

Test statistics :

Z= (p1 - p2) /√p(1-p)× (1/n1 + 1/n2)

0.3889- 0.2913 / √0.3232 × 0.6768 × (1/162 +1/333)

=2.1784

c) Critical value :

Two tailed critical value, z critical = Norm.S .INV (0.05/2) = 1.960

Reject H o if z < -1.96 or if z > 1.96

d) Decision:

z = 2.1784 > 1.96,

Reject the null hypothesis

7 0
3 years ago
What's is the slope of this line?<br>Need this ASAP​
Basile [38]

Answer:

\displaystyle m=2

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

Reading a Cartesian Plane

  • Coordinates (x, y)

Slope Formula: \displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Find points from graph.</em>

Point (0, 3)

Point (1, 5)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

  1. Substitute in points [Slope Formula]:                                                             \displaystyle m=\frac{5-3}{1-0}
  2. [Slope] Subtract:                                                                                              \displaystyle m=\frac{2}{1}
  3. [Slope] Divide:                                                                                                  \displaystyle m=2
5 0
3 years ago
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